mfrac-03.test

<<< mml
<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <mfrac>    <mi>A</mi>     <mrow>      <mi>B</mi>       <mo>+</mo>       <mfrac>        <mi>C</mi>         <mrow>          <mi>D</mi>           <mo>+</mo>           <mfrac>            <mi>E</mi>             <mi>F</mi>           </mfrac>         </mrow>       </mfrac>     </mrow>   </mfrac>   <mo>=</mo>   <mfrac>    <mrow>      <mover>        <mi>A</mi>
        <mphantom>
          <mn>0</mn>
        </mphantom>
      </mover>
    </mrow>     <mrow>      <mi>B</mi>       <mo>+</mo>       <mfrac>        <mi>C</mi>         <mrow>          <mi>D</mi>           <mo>+</mo>           <mfrac>            <mi>E</mi>             <mrow>              <munder>                <mi>F</mi>
                <mphantom>
                  <mn>0</mn>
                </mphantom>
              </munder>
            </mrow>           </mfrac>         </mrow>       </mfrac>     </mrow>   </mfrac> </math>
>>> native
[ EFraction
    NormalFrac
    (EIdentifier "A")
    (EGrouped
       [ EIdentifier "B"
       , ESymbol Bin "+"
       , EFraction
           NormalFrac
           (EIdentifier "C")
           (EGrouped
              [ EIdentifier "D"
              , ESymbol Bin "+"
              , EFraction NormalFrac (EIdentifier "E") (EIdentifier "F")
              ])
       ])
, ESymbol Rel "="
, EFraction
    NormalFrac
    (EOver False (EIdentifier "A") (EPhantom (ENumber "0")))
    (EGrouped
       [ EIdentifier "B"
       , ESymbol Bin "+"
       , EFraction
           NormalFrac
           (EIdentifier "C")
           (EGrouped
              [ EIdentifier "D"
              , ESymbol Bin "+"
              , EFraction
                  NormalFrac
                  (EIdentifier "E")
                  (EUnder False (EIdentifier "F") (EPhantom (ENumber "0")))
              ])
       ])
]