WSJT-X/boost/libs/math/doc/equations/legendre_4.mml

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<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>l</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
</msub>
<mfenced>
<mrow>
<mi>x</mi>
</mrow>
</mfenced>
<mspace width="1em"/>
<mo>=</mo>
<mspace width="1em"/>
<mfrac>
<mrow>
<mfenced>
<mrow>
<mn>2</mn>
<mi>l</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mfenced>
<mi>x</mi>
<msub>
<mi>P</mi>
<mi>l</mi>
</msub>
<mfenced>
<mrow>
<mi>x</mi>
</mrow>
</mfenced>
<mo>&#x2212;</mo>
<mi>l</mi>
<msub>
<mi>P</mi>
<mrow>
<mi>l</mi>
<mo>&#x2212;</mo>
<mn>1</mn>
</mrow>
</msub>
<mfenced>
<mrow>
<mi>x</mi>
</mrow>
</mfenced>
</mrow>
<mfenced>
<mrow>
<mi>l</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mfenced>
</mfrac>
</mrow>
</math>