msupBsize3

W3C sample	WIRIS
	$\int^{1} + {\frac{x}{y}}^{a} + {\frac{x}{y}}^{1} + \int^{a} + \int^{a}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <msup>
    <mo>&#x222B;</mo>
    <mn>1</mn>
  </msup>
  <mo>+</mo>
  <msup>
    <mstyle mathbackground="green">
      <mfrac>
        <mi>x</mi>
        <mi>y</mi>
      </mfrac>
    </mstyle>
    <mi>a</mi>
  </msup>
  <mo>+</mo>
  <msup>
    <mstyle mathbackground="green">
      <mfrac>
        <mi>x</mi>
        <mi>y</mi>
      </mfrac>
    </mstyle>
    <mn>1</mn>
  </msup>
  <mo>+</mo>
  <msup>
    <mo>&#x222B;</mo>
    <mi>a</mi>
  </msup>
  <mo>+</mo>
  <mstyle displaystyle="true">
    <msup>
      <mo>&#x222B;</mo>
      <mi>a</mi>
    </msup>
  </mstyle>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)