msub-08

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

W3C sample	WIRIS
	$$A_{B_C}=A_{B_{\underset{\phantom{D}}{C}}}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <msub>
    <mi>A</mi>
    <mrow>
      <msub>
        <mi>B</mi>
        <mi>C</mi>
      </msub>
    </mrow>
  </msub>
  <mo>=</mo>
  <msub>
    <mi>A</mi>
    <mrow>
      <msub>
        <mi>B</mi>
        <mrow>
          <munder>
            <mi>C</mi>
            <mphantom>
              <mi>D</mi>
            </mphantom>
          </munder>
        </mrow>
      </msub>
    </mrow>
  </msub>
</math>

Author: George Chavchanidze, Opera Software ASA