mfracZcomp-04.test

<<< native
[ EText TextNormal "Inline, auto, thick line\160"
, EFraction
    NormalFrac
    (EGrouped
       [ ESuper (EIdentifier "x") (ENumber "2")
       , ESymbol Bin "+"
       , ENumber "1"
       ])
    (EIdentifier "x")
, EText
    TextNormal ", the superscripted 2 should be script-script size."
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mtext mathvariant="normal">Inline, auto, thick line </mtext>
    <mfrac>
      <mrow>
        <msup>
          <mi>x</mi>
          <mn>2</mn>
        </msup>
        <mo>+</mo>
        <mn>1</mn>
      </mrow>
      <mi>x</mi>
    </mfrac>
    <mtext mathvariant="normal">, the superscripted 2 should be script-script size.</mtext>
  </mrow>
</math>