msubsup-12

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

W3C sample	WIRIS
	$$V_m^n=\underset{\phantom{\text{d}}}{\overset{\phantom{\text{d}}}{V_m^n}}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msubsup>
    <mi>V</mi>
    <mi>m</mi>
    <mi>n</mi>
  </msubsup>
  <mo>=</mo>
  <munderover>
    <mrow>
      <msubsup>
        <mi>V</mi>
        <mi>m</mi>
        <mi>n</mi>
      </msubsup>
    </mrow>
    <mphantom>
      <mtext>d</mtext>
    </mphantom>
    <mphantom>
      <mtext>d</mtext>
    </mphantom>
  </munderover>
</math>

Author: George Chavchanidze, Opera Software ASA