texmath-0.12.7: test/writer/typst/boxed.test

<<< native
[ EBoxed
    (EGrouped
       [ ESuper (EIdentifier "x") (ENumber "2")
       , ESymbol Bin "+"
       , ESuper (EIdentifier "y") (ENumber "2")
       , ESymbol Bin "+"
       , ESuper (EIdentifier "z") (ENumber "2")
       ])
]
>>> typst
#box([x^2 plus y^2 plus z^2])