msubsupBsize2

W3C sample	WIRIS
	$\int_{0}^{1} + {\frac{x}{y}}_{0}^{a} + {\frac{x}{y}}_{0}^{1} + \int_{0}^{a}$

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    <mn>1</mn>
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  <msubsup>
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  <mo>+</mo>
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    <msubsup>
      <mo>&#x222B;</mo>
      <mn>0</mn>
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</math>

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