msup-06

Formatting of right hand side of equation should be identical to formatting of left hand side

W3C sample	WIRIS
	$$S^3=S^3\phantom{\frac{\mathrm{test}}{\mathrm{failed}}}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msup>
    <mi>S</mi>
    <mn>3</mn>
  </msup>
  <mo>=</mo>
  <msup>
    <mrow>
      <mi>S</mi>
    </mrow>
    <mrow>
      <mn>3</mn>
    </mrow>
  </msup>
  <mphantom>
    <mfrac>
      <mi>test</mi>
      <mi>failed</mi>
    </mfrac>
  </mphantom>
</math>

Author: George Chavchanidze, Opera Software ASA