msup-04.test

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

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <msup>    <mn>2</mn>     <mrow>      <msup>        <mn>3</mn>         <mn>4</mn>       </msup>     </mrow>   </msup>   <mo>=</mo>   <msup>    <mn>2</mn>     <mrow>      <msup>        <mn>3</mn>         <mrow>          <msup>            <mn>4</mn>             <mphantom>              <mi>fail</mi>
            </mphantom>           </msup>         </mrow>       </msup>     </mrow>   </msup> </math>
>>> native
[ ESuper (ENumber "2") (ESuper (ENumber "3") (ENumber "4"))
, ESymbol Rel "="
, ESuper
    (ENumber "2")
    (ESuper
       (ENumber "3")
       (ESuper (ENumber "4") (EPhantom (EIdentifier "fail"))))
]