<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mfenced close=")" open="(">
      <mrow>
         <mi>x</mi>
         <mo>+</mo>
         <mi>y</mi>
      </mrow>
   </mfenced>
   <mo>/</mo>
   <mn>2</mn>
</math>
