ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="StartBinomialOrMatrix n Choose k EndBinomialOrMatrix equals StartFraction n factorial Over k factorial left-parenthesis n minus k right-parenthesis factorial EndFraction">
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            <mo maxsize="2.047em" minsize="2.047em" data-semantic-type="fence" data-semantic-role="close" data-semantic-id="6" data-semantic-parent="5">)</mo>
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      <mo data-semantic-type="relation" data-semantic-role="equality" data-semantic-id="8" data-semantic-parent="24" data-semantic-operator="relseq,=">=</mo>
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            <mo data-semantic-type="punctuation" data-semantic-role="unknown" data-semantic-id="10" data-semantic-parent="11" data-semantic-operator="punctuated">!</mo>
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                  <!-- − -->
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    <annotation encoding="application/x-tex">{\binom {n}{k}}={\frac {n!}{k!(n-k)!}}</annotation>
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</math>