<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mo>|</mo>
   <msup>
      <mfenced close="]" open="[">
         <mi>k</mi>
      </mfenced>
      <mi>n</mi>
   </msup>
   <mfenced close=")" open="(">
      <mrow>
         <mn>1</mn>
         <mrow>
            <mo>-</mo>
         </mrow>
         <mn>1</mn>
      </mrow>
   </mfenced>
   <mo>|</mo>
   <mo>=</mo>
   <mrow>
      <mi>k</mi>
   </mrow>
   <mrow>
      <mi>n</mi>
   </mrow>
   <mi>n</mi>
   <mo>!</mo>
   <mo>=</mo>
   <msub>
      <mfenced close=")" open="(">
         <mi>k</mi>
      </mfenced>
      <mi>n</mi>
   </msub>
</math>
