mfencedBfences7

W3C sample	WIRIS
	$\left(a+b\right)+\left(\frac{1}{2}\right)$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced>
    <mrow>
      <mi>a</mi>
      <mo>+</mo>
      <mi>b</mi>
    </mrow>
  </mfenced>
  <mo>+</mo>
  <mfenced>
    <mfrac>
      <mn>1</mn>
      <mn>2</mn>
    </mfrac>
  </mfenced>
</math>

Author: Robert Miner and Jeff Schaefer, Geometry Technologies