ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mstyle displaystyle="true"><munderover><mo>&#x0222B;</mo><mn>0</mn><mn>1</mn></munderover></mstyle><msub><mi>P</mi><mi>n</mi></msub><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mn>1</mn><mo>-</mo><mn>2</mn><msup><mi>x</mi><mn>2</mn></msup><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mi>sin</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>x</mi><mi>y</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mi mathvariant="normal">d</mi><mi>x</mi><mo>=</mo><mstyle scriptlevel="0" displaystyle="false"><mrow><mfrac linethickness="1"><mn>1</mn><mn>2</mn></mfrac></mrow></mstyle><mi>&#x003C0;</mi><msup><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><msub><mi>J</mi><mrow><mi>n</mi><mo>+</mo><mfrac linethickness="1"><mn>1</mn><mn>2</mn></mfrac></mrow></msub><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mstyle scriptlevel="0" displaystyle="false"><mrow><mfrac linethickness="1"><mn>1</mn><mn>2</mn></mfrac></mrow></mstyle><mi>y</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mn>2</mn></msup></mrow></math>