intersect1

A intersect (B union C)

W3C sample	WIRIS
[N/A]	$intersect A union B C$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="set1">intersect</csymbol>
    <semantics>
      <ci>A</ci>
      <annotation-xml cd="mathmltypes" name="type" encoding="MathML-Content">
        <ci>set</ci>
      </annotation-xml>
    </semantics>
    <apply>
      <csymbol cd="set1">union</csymbol>
      <semantics>
        <ci>B</ci>
        <annotation-xml cd="mathmltypes" name="type" encoding="MathML-Content">
          <ci>set</ci>
        </annotation-xml>
      </semantics>
      <semantics>
        <ci>C</ci>
        <annotation-xml cd="mathmltypes" name="type" encoding="MathML-Content">
          <ci>set</ci>
        </annotation-xml>
      </semantics>
    </apply>
  </apply>
</math>

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