<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mfenced close=")" open="(">
      <mi>a</mi>
      <mi>b</mi>
      <mfenced close=")" open="(">
         <mi>c</mi>
         <mi>d</mi>
         <mi>e</mi>
      </mfenced>
   </mfenced>
</math>
