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Visualization for goldstandard

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<?xml version="1.0" encoding="UTF-8"?> <math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle mathvariant="sans-serif"> <msub> <mi>Q</mi> <mi>n</mi> </msub> </mstyle> <mstyle mathvariant="normal"> <mfenced close=")" open="("> <mrow> <mi>cos</mi> <mi>θ</mi> </mrow> </mfenced> <mo>=</mo> <mfrac> <mrow> <msup> <mn>2</mn> <mrow> <mn>2</mn> <mi>n</mi> <mo>+</mo> <mn>1</mn> </mrow> </msup> <msup> <mfenced close=")" open="("> <mrow> <mi>n</mi> <mo>!</mo> </mrow> </mfenced> <mn>2</mn> </msup> </mrow> <mrow> <mfenced close=")" open="("> <mrow> <mn>2</mn> <mi>n</mi> <mo>+</mo> <mn>1</mn> </mrow> </mfenced> <mo>!</mo> </mrow> </mfrac> <msubsup> <mo></mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>0</mn> </mrow> <mi></mi> </msubsup> <mfrac> <mrow> <mn>1</mn> <mo></mo> <mn>3</mn> <mi></mi> <mfenced close=")" open="("> <mrow> <mn>2</mn> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </mfenced> </mrow> <mrow> <mi>k</mi> <mo>!</mo> </mrow> </mfrac> <mfrac> <mrow> <mfenced close=")" open="("> <mrow> <mi>n</mi> <mo>+</mo> <mn>1</mn> </mrow> </mfenced> <mfenced close=")" open="("> <mrow> <mi>n</mi> <mo>+</mo> <mn>2</mn> </mrow> </mfenced> <mi></mi> <mfenced close=")" open="("> <mrow> <mi>n</mi> <mo>+</mo> <mi>k</mi> </mrow> </mfenced> </mrow> <mrow> <mfenced close=")" open="("> <mrow> <mn>2</mn> <mi>n</mi> <mo>+</mo> <mn>3</mn> </mrow> </mfenced> <mfenced close=")" open="("> <mrow> <mn>2</mn> <mi>n</mi> <mo>+</mo> <mn>5</mn> </mrow> </mfenced> <mi></mi> <mfenced close=")" open="("> <mrow> <mn>2</mn> <mi>n</mi> <mo>+</mo> <mn>2</mn> <mi>k</mi> <mo>+</mo> <mn>1</mn> </mrow> </mfenced> </mrow> </mfrac> <mi>cos</mi> <mfenced close=")" open="("> <mrow> <mfenced close=")" open="("> <mrow> <mi>n</mi> <mo>+</mo> <mn>2</mn> <mi>k</mi> <mo>+</mo> <mn>1</mn> </mrow> </mfenced> <mi>θ</mi> </mrow> </mfenced> </mstyle> </math>