msubsup-02

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

W3C sample	WIRIS
	$${\phantom{z}S}_t^7=S_t^7$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msubsup>
    <mrow>
      <mphantom>
        <mi>z</mi>
      </mphantom>
      <mi>S</mi>
    </mrow>
    <mi>t</mi>
    <mn>7</mn>
  </msubsup>
  <mo>=</mo>
  <msubsup>
    <mi>S</mi>
    <mi>t</mi>
    <mn>7</mn>
  </msubsup>
</math>

Author: George Chavchanidze, Opera Software ASA