msubsup-05

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

W3C sample	WIRIS
	$$S_{Q_4^3}^{P_2^1}=S_{Q_{4\phantom{\text{z}}}^3}^{P_2^{1\phantom{\text{z}}}}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msubsup>
    <mi>S</mi>
    <mrow>
      <msubsup>
        <mi>Q</mi>
        <mn>4</mn>
        <mn>3</mn>
      </msubsup>
    </mrow>
    <mrow>
      <msubsup>
        <mi>P</mi>
        <mn>2</mn>
        <mn>1</mn>
      </msubsup>
    </mrow>
  </msubsup>
  <mo>=</mo>
  <msubsup>
    <mi>S</mi>
    <mrow>
      <msubsup>
        <mi>Q</mi>
        <mrow>
          <mn>4</mn>
          <mphantom>
            <mtext>z</mtext>
          </mphantom>
        </mrow>
        <mn>3</mn>
      </msubsup>
    </mrow>
    <mrow>
      <msubsup>
        <mi>P</mi>
        <mn>2</mn>
        <mrow>
          <mn>1</mn>
          <mphantom>
            <mtext>z</mtext>
          </mphantom>
        </mrow>
      </msubsup>
    </mrow>
  </msubsup>
</math>

Author: George Chavchanidze, Opera Software ASA