diff --git a/np-linear.cabal b/np-linear.cabal
--- a/np-linear.cabal
+++ b/np-linear.cabal
@@ -1,5 +1,5 @@
 name:                np-linear
-version:             0.2.0.1
+version:             0.3
 synopsis:            Linear algebra for the numeric-prelude framework
 -- description:         
 license:             BSD3
@@ -25,6 +25,6 @@
     numeric-prelude >= 0.4.1.1 && < 0.5,
     -- bifunctors >= 4.1 && < 0.5,
     reflection >= 1.3 && < 1.6,
-    tagged == 0.7.*
+    tagged >= 0.7 && < 0.8
   hs-source-dirs:      src
   default-language:    Haskell2010
diff --git a/src/Algebra/Linear.hs b/src/Algebra/Linear.hs
--- a/src/Algebra/Linear.hs
+++ b/src/Algebra/Linear.hs
@@ -69,7 +69,7 @@
 
 -- | Calculate all dependencies among the given vectors of degree d.
 dependencies :: (Algebra.Field.C k,Eq k) => Integer -> [Vector k] -> [Relation k]
-dependencies d = map (Relation . genericDrop d) . filter (all (== zero) . genericTake d) . (\ (r,_,_) -> r) . reduce . adorn
+dependencies d = map (Relation . genericDrop d) . filter (all (== zero) . genericTake d) . (\ (r,_,_) -> r) . reduce' . adorn
 
 -- | Calculate the equations satisfied by the subspace spanned by the given vectors of degree d.
 equations :: (Algebra.Field.C k,Eq k) => Integer -> [Vector k] -> [Relation k]
@@ -81,10 +81,10 @@
 
 inverseImage :: (Algebra.Field.C k,Eq k) => Matrix k -> Vector k -> Vector k
 inverseImage a = solveUpperTriangular u . matrixVector b where
-  (u,b,_) = reduce a
+  (u,b,_) = reduce' a
 
 invert :: (Algebra.Field.C k,Eq k) => Matrix k -> Maybe (Matrix k)
-invert m = fmap strip . process . (\ (r,_,_) -> r) . reduce . adorn $ m where
+invert m = fmap strip . process . (\ (r,_,_) -> r) . reduce' . adorn $ m where
   n = length m
   process x = go x where
     go [v] = Just [v]
@@ -101,10 +101,10 @@
         v₀ = v !! i
   strip = map (drop n)
 
-determinant :: (Algebra.Field.C k,Eq k) => Matrix k -> k
+determinant :: (Algebra.Field.C k,Eq k,DebugDeterminant k) => Matrix k -> k
 determinant x = case reduce x of (_,_,σ) -> σ
 
-adjoint :: (Algebra.Lattice.C k,Algebra.Field.C k,Eq k) => Matrix k -> Maybe (Matrix k)
+adjoint :: (Algebra.Lattice.C k,Algebra.Field.C k,Eq k,DebugDeterminant k) => Matrix k -> Maybe (Matrix k)
 adjoint a = (abs (determinant a) *>) <$> invert a
 
 diagonal :: Matrix k -> [k]
@@ -142,17 +142,23 @@
       | lᵢᵢ == 0  = error "Linear.solveLowerTriangular: zero on diagonal"
       | otherwise = y / lᵢᵢ
 
+class DebugDeterminant a where
+
+reduce :: (Algebra.Field.C k,Eq k,DebugDeterminant k) => Matrix k -> (Matrix k,Matrix k,k)
+reduce = reduce'
+
 -- Compute the row echelon form of the matrix,
 -- together with the basis transformation matrix,
 -- and its determinant.
-reduce :: (Algebra.Field.C k,Eq k) => Matrix k -> (Matrix k,Matrix k,k)
-reduce []          = ([],[],1)
-reduce xs@([] : _) = (xs,identity (length xs),1)
-reduce vs          = case nonZero of
-  []                    -> (\ (x,u,_σ) -> (map (0 :) x,u,0)) $ reduce (map tail vs)
+reduce' :: (Algebra.Field.C k,Eq k) => Matrix k -> (Matrix k,Matrix k,k)
+reduce' []          = ([],[],1)
+reduce' xs@([] : _) = (xs,identity (length xs),1)
+reduce' vs          = case nonZero of
+  []                    -> (\ (x,u,_σ) -> (map (0 :) x,u,0)) $ reduce' (map tail vs)
   (v@(v₀ : _),i) : []   -> let
-    (h,u,σ) = reduce (map (tail . fst) startZero)
-    sign = if i == 1 then 1 else -1
+    subMatrix = map (tail . fst) startZero
+    (h,u,σ) = reduce' subMatrix
+    sign = if odd i then 1 else -1
    in
     ( (map (/ v₀) v :) . map (0 :) $ h
     , normalisation v₀ `matrixProduct` rowSwap n (1,i) `matrixProduct` shift u
@@ -161,7 +167,8 @@
   (v@(v₀ : _),i) : rest -> let
     (reduced,translates) = unzip . flip map rest $ \ (x@(x₀ : _),j) -> let
       c = x₀ / v₀ in ((zipWith (\ vᵢ xᵢ -> xᵢ - c * vᵢ) v x,j),(j,c))
-    (h,u,σ) = reduce $ v : map fst reduced ++ map fst startZero
+    subMatrix = v : map fst reduced ++ map fst startZero
+    (h,u,σ) = reduce' subMatrix
     permutation = i : map snd reduced ++ map snd startZero
    in
     ( h
@@ -213,3 +220,65 @@
   , [3,-7, 8,-5,8,9 ]
   , [3,-9,12,-9,6,15]
   ]
+
+_M₁,_M₂,_M₃ :: Matrix Rational
+_M₁ =
+  [
+    [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1]
+  , [-169096784620000 % 453365147813277,-838720051715200 % 4987016625946047,6763871384800 % 151121715937759,216443884313600 % 4987016625946047,392304540318400 % 4987016625946047,27055485539200 % 1662338875315349,351721312009600 % 453365147813277,1975050444361600 % 4987016625946047,101458070772000 % 1662338875315349,5221708709065600 % 4987016625946047,1102511035722400 % 4987016625946047,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [3381935692400 % 19061697322899,-3381935692400 % 19061697322899,-3381935692400 % 19061697322899,0 % 1,0 % 1,3381935692400 % 19061697322899,3381935692400 % 19061697322899,0 % 1,0 % 1,-3381935692400 % 19061697322899,0 % 1,1 % 1]
+  , [0 % 1,-211370980775 % 537394176,0 % 1,211370980775 % 537394176,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-211370980775 % 537394176,0 % 1,1 % 1]
+  , [-3381935692400 % 36321901,0 % 1,3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,-3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [-108221942156800 % 524799,108221942156800 % 524799,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  ]
+_M₂ =
+  [
+    [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1]
+  , [-169096784620000 % 453365147813277,-838720051715200 % 4987016625946047,6763871384800 % 151121715937759,216443884313600 % 4987016625946047,392304540318400 % 4987016625946047,27055485539200 % 1662338875315349,351721312009600 % 453365147813277,1975050444361600 % 4987016625946047,101458070772000 % 1662338875315349,5221708709065600 % 4987016625946047,1102511035722400 % 4987016625946047,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [3381935692400 % 19061697322899,-3381935692400 % 19061697322899,-3381935692400 % 19061697322899,0 % 1,0 % 1,3381935692400 % 19061697322899,3381935692400 % 19061697322899,0 % 1,0 % 1,-3381935692400 % 19061697322899,0 % 1,1 % 1]
+  , [0 % 1,-211370980775 % 537394176,0 % 1,211370980775 % 537394176,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-211370980775 % 537394176,0 % 1,1 % 1]
+  , [-3381935692400 % 36321901,0 % 1,3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,-3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [-108221942156800 % 524799,108221942156800 % 524799,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  ]
+_M₃ =
+  [
+    [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1]
+  , [-169096784620000 % 453365147813277,-838720051715200 % 4987016625946047,6763871384800 % 151121715937759,216443884313600 % 4987016625946047,392304540318400 % 4987016625946047,27055485539200 % 1662338875315349,351721312009600 % 453365147813277,1975050444361600 % 4987016625946047,101458070772000 % 1662338875315349,5221708709065600 % 4987016625946047,1102511035722400 % 4987016625946047,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [3381935692400 % 19061697322899,-3381935692400 % 19061697322899,-3381935692400 % 19061697322899,0 % 1,0 % 1,3381935692400 % 19061697322899,3381935692400 % 19061697322899,0 % 1,0 % 1,-3381935692400 % 19061697322899,0 % 1,1 % 1]
+  , [0 % 1,-211370980775 % 537394176,0 % 1,211370980775 % 537394176,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-211370980775 % 537394176,0 % 1,1 % 1]
+  , [-3381935692400 % 36321901,0 % 1,3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,-3381935692400 % 36321901,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [-108221942156800 % 524799,108221942156800 % 524799,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  , [54110971078400 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,54110971078400 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]
+  ]
+d₁,d₂,d₃ :: Rational
+d₁ = 0 % 1
+d₂ = 2399533449150898860018929580106057857312831592024080652407697547921113137254208406108697383229906184194039925435269120000000000000 % 10384619707704007440069688317960727557546629554588436333459508359228638653867
+d₃ = -1199766724575449430009464790053028928656415796012040326203848773960556568627104203054348691614953092097019962717634560000000000000 % 10384619707704007440069688317960727557546629554588436333459508359228638653867
+
+test1,test2,test3,test4,test5,test7,test8 :: Matrix Rational
+test1 =
+    [[-169096784620000 % 453365147813277,-838720051715200 % 4987016625946047,6763871384800 % 151121715937759,216443884313600 % 4987016625946047,392304540318400 % 4987016625946047,27055485539200 % 1662338875315349,351721312009600 % 453365147813277,1975050444361600 % 4987016625946047,101458070772000 % 1662338875315349,5221708709065600 % 4987016625946047,1102511035722400 % 4987016625946047,1 % 1],[0 % 1,-135277427696 % 525510452511,-270554855392 % 1732881574809,4328877686272 % 209678670551889,7846090806368 % 209678670551889,5546374535536 % 29954095793127,135277427696 % 247554510687,39501008887232 % 209678670551889,676387138480 % 23297630061321,9604697366416 % 29954095793127,22050220714448 % 209678670551889,66973810188487 % 45384993625950],[0 % 1,16774401034304 % 399540911,270554855392 % 3301991,-4328877686272 % 399540911,-7846090806368 % 399540911,-1623329132352 % 399540911,-135277427696 % 471713,-39501008887232 % 399540911,-6087484246320 % 399540911,-104434174181312 % 399540911,-22050220714448 % 399540911,-64766190245461 % 259442150],[0 % 1,30302143803904 % 101277,-4328877686272 % 174933,-138524085960704 % 5772789,-251074905803776 % 5772789,-17315510745088 % 1924263,-225101639686144 % 524799,-1264032284391424 % 5772789,-21644388431360 % 641421,-3341893573801984 % 5772789,-705607062862336 % 5772789,-2417947450630819 % 4373325],[0 % 1,-536780833097728 % 11,12986633058816 % 1,138524085960704 % 11,251074905803776 % 11,51946532235264 % 11,225101639686144 % 1,1264032284391424 % 11,194799495882240 % 11,3341893573801984 % 11,705607062862336 % 11,7253842365012457 % 25],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,-211370980775 % 537394176,0 % 1,211370980775 % 537394176,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-211370980775 % 537394176,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]]
+test2 =
+    [[-135277427696 % 525510452511,-270554855392 % 1732881574809,4328877686272 % 209678670551889,7846090806368 % 209678670551889,5546374535536 % 29954095793127,135277427696 % 247554510687,39501008887232 % 209678670551889,676387138480 % 23297630061321,9604697366416 % 29954095793127,22050220714448 % 209678670551889,66973810188487 % 45384993625950],[0 % 1,6763871384800 % 119772219,-108221942156800 % 14492438499,-196152270159200 % 14492438499,54110971078400 % 2070348357,-3381935692400 % 17110317,-987525222180800 % 14492438499,-50729035386000 % 4830812833,-432887768627200 % 2070348357,-551255517861200 % 14492438499,-1124184870087 % 125475658],[0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,108221942156800 % 524799,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,1162300833 % 1],[0 % 1,16990844918617600 % 399,3463102149017600 % 399,6276872645094400 % 399,-1731551074508800 % 57,6926204298035200 % 57,31600807109785600 % 399,1623329132352000 % 133,13852408596070400 % 57,17640176571558400 % 399,197878620851139 % 19],[0 % 1,2325080788525 % 9746376192,77573149944425 % 214420276224,-6129758442475 % 107210138112,-8666210211775 % 30631468032,-2325080788525 % 2784678912,-15430081596575 % 53605069056,-1056854903875 % 23824475136,-211370980775 % 239308344,-34453469866325 % 214420276224,-66944106946759 % 29703241728],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]]
+test3 = [[6763871384800 % 119772219,-108221942156800 % 14492438499,-196152270159200 % 14492438499,54110971078400 % 2070348357,-3381935692400 % 17110317,-987525222180800 % 14492438499,-50729035386000 % 4830812833,-432887768627200 % 2070348357,-551255517861200 % 14492438499,-1124184870087 % 125475658],[0 % 1,-1731551074508800 % 63500679,-3138436322547200 % 63500679,6385094587251200 % 21166893,-270554855392000 % 524799,-15800403554892800 % 63500679,-270554855392000 % 7055631,-61578285087219200 % 63500679,-8820088285779200 % 63500679,724539378362069 % 641421],[0 % 1,1731551074508800 % 121,3138436322547200 % 121,-6060428760780800 % 121,270554855392000 % 1,15800403554892800 % 121,2434993698528000 % 121,48483430086246400 % 121,8820088285779200 % 121,188875843483779 % 11],[0 % 1,211370980775 % 537394176,0 % 1,-211370980775 % 537394176,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,-178053373 % 80352],[0 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]]
+test4 = [[-1731551074508800 % 63500679,-3138436322547200 % 63500679,6385094587251200 % 21166893,-270554855392000 % 524799,-15800403554892800 % 63500679,-270554855392000 % 7055631,-61578285087219200 % 63500679,-8820088285779200 % 63500679,724539378362069 % 641421],[0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,-108221942156800 % 1,0 % 1,609975477158400 % 1],[0 % 1,-6129758442475 % 8598306816,34030727904775 % 8598306816,-11625403942625 % 1563328512,-15430081596575 % 4299153408,-1056854903875 % 1910734848,-120270088060975 % 8598306816,-34453469866325 % 17196613632,5634017560436093 % 400212099072],[0 % 1,0 % 1,0 % 1,-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,0 % 1,0 % 1,0 % 1,541109710784 % 95367421875,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]]
+test5 = [[-108221942156800 % 524799,0 % 1,0 % 1,108221942156800 % 524799,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,-541109710784 % 95367421875,541109710784 % 95367421875,577984359097 % 577984375000],[0 % 1,0 % 1,0 % 1,108221942156800 % 1,0 % 1,524800 % 1],[0 % 1,0 % 1,6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,211370980775 % 536346624,0 % 1,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,0 % 1,0 % 1,1 % 1]]
+test7 = [[0 % 1,-541109710784 % 95367421875,541109710784 % 95367421875,577984359097 % 577984375000],[0 % 1,108221942156800 % 1,0 % 1,524800 % 1],[6763871384800 % 16663069252269,0 % 1,0 % 1,1 % 1],[0 % 1,0 % 1,0 % 1,1 % 1]]
+test8 = [[-541109710784 % 95367421875,541109710784 % 95367421875,577984359097 % 577984375000],[108221942156800 % 1,0 % 1,524800 % 1],[0 % 1,0 % 1,1 % 1]]