maction-02.test

<<< native
[ EDelimited
    "("
    ")"
    [ Right
        (EArray
           [ AlignCenter ]
           [ [ [ EIdentifier "n" ] ] , [ [ EIdentifier "k" ] ] ])
    ]
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mo stretchy="true" form="prefix">(</mo>
    <mtable>
      <mtr>
        <mtd columnalign="center" style="text-align: center">
          <mi>n</mi>
        </mtd>
      </mtr>
      <mtr>
        <mtd columnalign="center" style="text-align: center">
          <mi>k</mi>
        </mtd>
      </mtr>
    </mtable>
    <mo stretchy="true" form="postfix">)</mo>
  </mrow>
</math>