<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mi>p</mi>
   <mfenced close=")" open="(">
      <msub>
         <mi>π</mi>
         <mi>n</mi>
      </msub>
   </mfenced>
   <mo>=</mo>
   <msub>
      <mo>∑</mo>
      <mi>α</mi>
   </msub>
   <mspace width="0.278em"/>
   <msub>
      <mi>p</mi>
      <mi>n</mi>
   </msub>
   <mfenced close=")" open="(">
      <msub>
         <mi>e</mi>
         <mi>α</mi>
      </msub>
   </mfenced>
   <mo>+</mo>
   <mi>q</mi>
   <mfenced close=")" open="(">
      <msub>
         <mi>π</mi>
         <mi>n</mi>
      </msub>
   </mfenced>
</math>
