<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> | |
<mrow> | |
<mtable> | |
<mtr> | |
<mtd> | |
<msubsup> | |
<mi>P</mi> | |
<mrow> | |
<mi>l</mi> | |
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<mrow> | |
<mo>−</mo> | |
<mi>m</mi> | |
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<mfenced> | |
<mrow> | |
<mi>x</mi> | |
</mrow> | |
</mfenced> | |
<mspace width="1em"/> | |
<mo>=</mo> | |
<mspace width="1em"/> | |
<msup> | |
<mfenced> | |
<mrow> | |
<mo>−</mo> | |
<mn>1</mn> | |
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<mi>m</mi> | |
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<mfrac> | |
<mrow> | |
<mfenced> | |
<mrow> | |
<mi>l</mi> | |
<mo>−</mo> | |
<mi>m</mi> | |
</mrow> | |
</mfenced> | |
<mo>!</mo> | |
</mrow> | |
<mrow> | |
<mfenced> | |
<mrow> | |
<mi>l</mi> | |
<mo>+</mo> | |
<mi>m</mi> | |
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</mfenced> | |
<mo>!</mo> | |
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<msubsup> | |
<mi>P</mi> | |
<mrow> | |
<mi>l</mi> | |
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<mi>m</mi> | |
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<mfenced> | |
<mrow> | |
<mi>x</mi> | |
</mrow> | |
</mfenced> | |
</mtd> | |
</mtr> | |
<mtr> | |
<mtd> | |
<msubsup> | |
<mi>P</mi> | |
<mrow> | |
<mo>−</mo> | |
<mi>l</mi> | |
<mo>−</mo> | |
<mn>1</mn> | |
</mrow> | |
<mi>m</mi> | |
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<mfenced> | |
<mrow> | |
<mi>x</mi> | |
</mrow> | |
</mfenced> | |
<mspace width="1em"/> | |
<mo>=</mo> | |
<mspace width="1em"/> | |
<msubsup> | |
<mi>P</mi> | |
<mrow> | |
<mi>l</mi> | |
</mrow> | |
<mi>m</mi> | |
</msubsup> | |
<mfenced> | |
<mrow> | |
<mi>x</mi> | |
</mrow> | |
</mfenced> | |
</mtd> | |
</mtr> | |
</mtable> | |
</mrow> | |
</math> | |