<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <msubsup>
      <mo>∑</mo>
      <mrow>
         <mi>n</mi>
         <mo>=</mo>
         <mn>1</mn>
      </mrow>
      <mi>∞</mi>
   </msubsup>
   <mi>f</mi>
   <mfenced close=")" open="(">
      <mi>n</mi>
   </mfenced>
   <mo>=</mo>
   <msub>
      <mo>∏</mo>
      <mi>p</mi>
   </msub>
   <msup>
      <mfenced close=")" open="(">
         <mrow>
            <mn>1</mn>
            <mo>-</mo>
            <mi>f</mi>
            <mfenced close=")" open="(">
               <mi>p</mi>
            </mfenced>
         </mrow>
      </mfenced>
      <mn>-1</mn>
   </msup>
</math>
