ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="upper A Subscript n Baseline upper B Subscript n minus 1 Baseline minus upper B Subscript n Baseline upper A Subscript n minus 1 Baseline equals left-parenthesis negative 1 right-parenthesis Superscript n minus 1 Baseline product Underscript k equals 1 Overscript n Endscripts a Subscript k">
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              <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="4" data-semantic-parent="7">n</mi>
              <mo data-semantic-type="operator" data-semantic-role="subtraction" data-semantic-id="5" data-semantic-parent="7" data-semantic-operator="infixop,−">−
                <!-- − -->
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        <mo data-semantic-type="operator" data-semantic-role="subtraction" data-semantic-id="9" data-semantic-parent="46" data-semantic-operator="infixop,−">−
          <!-- − -->
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          <mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="44" data-semantic-parent="45" data-semantic-added="true" data-semantic-operator="infixop,⁢">⁢</mo>
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              <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="14" data-semantic-parent="17">n</mi>
              <mo data-semantic-type="operator" data-semantic-role="subtraction" data-semantic-id="15" data-semantic-parent="17" data-semantic-operator="infixop,−">−
                <!-- − -->
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                <!-- − -->
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            <mo stretchy="false" data-semantic-type="fence" data-semantic-role="close" data-semantic-id="23" data-semantic-parent="40">)</mo>
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            <mo data-semantic-type="operator" data-semantic-role="subtraction" data-semantic-id="25" data-semantic-parent="27" data-semantic-operator="infixop,−">−
              <!-- − -->
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            <mo data-semantic-type="largeop" data-semantic-role="sum" data-semantic-id="29" data-semantic-parent="35" data-semantic-operator="bigop">∏
              <!-- ∏ -->
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              <mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-id="32" data-semantic-parent="33">1</mn>
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    <annotation encoding="application/x-tex">A_{n}B_{n-1}-B_{n}A_{n-1}=(-1)^{n-1}\prod _{k=1}^{n}a_{k}</annotation>
  </semantics>
</math>