yle>
    </math>

<!--
   The displaystyle attribute is allowed on the mtable element to set the
   inherited value of the attribute. If the attribute is not present, the
   mtable element sets displaystyle to "false" within the table elements.
-->
    <math>
      <mstyle displaystyle="false">
        <mtable displaystyle="true">
          <mtr>
            <mtd>
              <munder><mo>O</mo><mo>O</mo></munder>
            </mtd>
          </mtr>
        </mtable>
      </mstyle>
      <mstyle displayst