04.test

<<< native
[ ESub (EIdentifier "S") (EText TextNormal "new")
, ESymbol Rel "="
, ESub (EIdentifier "S") (EText TextNormal "old")
, ESymbol Bin "\8722"
, EFraction
    NormalFrac
    (ESuper
       (EDelimited
          "("
          ")"
          [ Right (ENumber "5")
          , Right (ESymbol Bin "\8722")
          , Right (EIdentifier "T")
          ])
       (ENumber "2"))
    (ENumber "2")
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msub>
      <mi>S</mi>
      <mtext mathvariant="normal">new</mtext>
    </msub>
    <mo>=</mo>
    <msub>
      <mi>S</mi>
      <mtext mathvariant="normal">old</mtext>
    </msub>
    <mo>−</mo>
    <mfrac>
      <msup>
        <mrow>
          <mo stretchy="true" form="prefix">(</mo>
          <mn>5</mn>
          <mo>−</mo>
          <mi>T</mi>
          <mo stretchy="true" form="postfix">)</mo>
        </mrow>
        <mn>2</mn>
      </msup>
      <mn>2</mn>
    </mfrac>
  </mrow>
</math>