stretchVertNest2

Tests of nested vertical stretching

W3C sample	WIRIS
	${\displaystyle \left(\left(\frac{x}{y}\right)\right)}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mstyle fontsize="130%" displaystyle="true">
    <mrow>
      <mo stretchy="true">(</mo>
      <mrow>
        <mo stretchy="true">(</mo>
        <mfrac>
          <mi>x</mi>
          <mi>y</mi>
        </mfrac>
        <mo stretchy="true">)</mo>
      </mrow>
      <mo stretchy="true">)</mo>
    </mrow>
  </mstyle>
</math>

Author: Dave Doyle, Design Science