maction-02.test

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

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <maction actiontype="tooltip">    <mrow>      <mfenced>        <mrow>          <mtable>            <mtr>              <mtd>                <mi>n</mi>
              </mtd>
            </mtr>             <mtr>              <mtd>                <mi>k</mi>
              </mtd>
            </mtr>           </mtable>         </mrow>       </mfenced>     </mrow>     <mrow>      <mfrac>        <mrow>          <mi>n</mi>
          <mo form="postfix">!</mo>
        </mrow>         <mrow>          <mi>k</mi>
          <mo form="postfix">!</mo>
          <mo fence="true">(</mo>
          <mi>n</mi>
          <mo>−</mo>
          <mi>k</mi>
          <mo fence="true">)</mo>
          <mo form="postfix">!</mo>
        </mrow>       </mfrac>     </mrow>   </maction> </math>
>>> native
[ EDelimited
    "("
    ")"
    [ Right
        (EArray
           [ AlignCenter ]
           [ [ [ EIdentifier "n" ] ] , [ [ EIdentifier "k" ] ] ])
    ]
]