Optimal. Leaf size=126 \[ -\frac {\text {Li}_3\left (e^{2 i (a+b x)}\right )}{2 b^3}+\frac {\log (\sin (a+b x))}{b^3}+\frac {i x \text {Li}_2\left (e^{2 i (a+b x)}\right )}{b^2}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2}{2 b}+\frac {i x^3}{3} \]
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Rubi [A] time = 0.19, antiderivative size = 126, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 8, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.667, Rules used = {3720, 3475, 30, 3717, 2190, 2531, 2282, 6589} \[ \frac {i x \text {PolyLog}\left (2,e^{2 i (a+b x)}\right )}{b^2}-\frac {\text {PolyLog}\left (3,e^{2 i (a+b x)}\right )}{2 b^3}-\frac {x \cot (a+b x)}{b^2}+\frac {\log (\sin (a+b x))}{b^3}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2}{2 b}+\frac {i x^3}{3} \]
Antiderivative was successfully verified.
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Rule 30
Rule 2190
Rule 2282
Rule 2531
Rule 3475
Rule 3717
Rule 3720
Rule 6589
Rubi steps
\begin {align*} \int x^2 \cot ^3(a+b x) \, dx &=-\frac {x^2 \cot ^2(a+b x)}{2 b}+\frac {\int x \cot ^2(a+b x) \, dx}{b}-\int x^2 \cot (a+b x) \, dx\\ &=\frac {i x^3}{3}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \cot ^2(a+b x)}{2 b}+2 i \int \frac {e^{2 i (a+b x)} x^2}{1-e^{2 i (a+b x)}} \, dx+\frac {\int \cot (a+b x) \, dx}{b^2}-\frac {\int x \, dx}{b}\\ &=-\frac {x^2}{2 b}+\frac {i x^3}{3}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}+\frac {\log (\sin (a+b x))}{b^3}+\frac {2 \int x \log \left (1-e^{2 i (a+b x)}\right ) \, dx}{b}\\ &=-\frac {x^2}{2 b}+\frac {i x^3}{3}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}+\frac {\log (\sin (a+b x))}{b^3}+\frac {i x \text {Li}_2\left (e^{2 i (a+b x)}\right )}{b^2}-\frac {i \int \text {Li}_2\left (e^{2 i (a+b x)}\right ) \, dx}{b^2}\\ &=-\frac {x^2}{2 b}+\frac {i x^3}{3}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}+\frac {\log (\sin (a+b x))}{b^3}+\frac {i x \text {Li}_2\left (e^{2 i (a+b x)}\right )}{b^2}-\frac {\operatorname {Subst}\left (\int \frac {\text {Li}_2(x)}{x} \, dx,x,e^{2 i (a+b x)}\right )}{2 b^3}\\ &=-\frac {x^2}{2 b}+\frac {i x^3}{3}-\frac {x \cot (a+b x)}{b^2}-\frac {x^2 \cot ^2(a+b x)}{2 b}-\frac {x^2 \log \left (1-e^{2 i (a+b x)}\right )}{b}+\frac {\log (\sin (a+b x))}{b^3}+\frac {i x \text {Li}_2\left (e^{2 i (a+b x)}\right )}{b^2}-\frac {\text {Li}_3\left (e^{2 i (a+b x)}\right )}{2 b^3}\\ \end {align*}
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Mathematica [A] time = 5.49, size = 221, normalized size = 1.75 \[ -\frac {2 b^3 x^3 \cot (a)+3 b^2 x^2 \csc ^2(a+b x)+2 e^{-i a} \sin (a) (\cot (a)+i) \left (-b^3 x^3 \cot (a)+3 b^2 x^2 \log \left (1-e^{-i (a+b x)}\right )+3 b^2 x^2 \log \left (1+e^{-i (a+b x)}\right )+6 i b x \text {Li}_2\left (-e^{-i (a+b x)}\right )+6 i b x \text {Li}_2\left (e^{-i (a+b x)}\right )+6 \text {Li}_3\left (-e^{-i (a+b x)}\right )+6 \text {Li}_3\left (e^{-i (a+b x)}\right )+i b^3 x^3\right )+6 b x \cot (a)-6 \log (\sin (a+b x))-6 b x \csc (a) \sin (b x) \csc (a+b x)}{6 b^3} \]
Antiderivative was successfully verified.
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fricas [C] time = 0.66, size = 423, normalized size = 3.36 \[ \frac {4 \, b^{2} x^{2} + 4 \, b x \sin \left (2 \, b x + 2 \, a\right ) + {\left (2 i \, b x \cos \left (2 \, b x + 2 \, a\right ) - 2 i \, b x\right )} {\rm Li}_2\left (\cos \left (2 \, b x + 2 \, a\right ) + i \, \sin \left (2 \, b x + 2 \, a\right )\right ) + {\left (-2 i \, b x \cos \left (2 \, b x + 2 \, a\right ) + 2 i \, b x\right )} {\rm Li}_2\left (\cos \left (2 \, b x + 2 \, a\right ) - i \, \sin \left (2 \, b x + 2 \, a\right )\right ) + 2 \, {\left (a^{2} - {\left (a^{2} - 1\right )} \cos \left (2 \, b x + 2 \, a\right ) - 1\right )} \log \left (-\frac {1}{2} \, \cos \left (2 \, b x + 2 \, a\right ) + \frac {1}{2} i \, \sin \left (2 \, b x + 2 \, a\right ) + \frac {1}{2}\right ) + 2 \, {\left (a^{2} - {\left (a^{2} - 1\right )} \cos \left (2 \, b x + 2 \, a\right ) - 1\right )} \log \left (-\frac {1}{2} \, \cos \left (2 \, b x + 2 \, a\right ) - \frac {1}{2} i \, \sin \left (2 \, b x + 2 \, a\right ) + \frac {1}{2}\right ) + 2 \, {\left (b^{2} x^{2} - a^{2} - {\left (b^{2} x^{2} - a^{2}\right )} \cos \left (2 \, b x + 2 \, a\right )\right )} \log \left (-\cos \left (2 \, b x + 2 \, a\right ) + i \, \sin \left (2 \, b x + 2 \, a\right ) + 1\right ) + 2 \, {\left (b^{2} x^{2} - a^{2} - {\left (b^{2} x^{2} - a^{2}\right )} \cos \left (2 \, b x + 2 \, a\right )\right )} \log \left (-\cos \left (2 \, b x + 2 \, a\right ) - i \, \sin \left (2 \, b x + 2 \, a\right ) + 1\right ) - {\left (\cos \left (2 \, b x + 2 \, a\right ) - 1\right )} {\rm polylog}\left (3, \cos \left (2 \, b x + 2 \, a\right ) + i \, \sin \left (2 \, b x + 2 \, a\right )\right ) - {\left (\cos \left (2 \, b x + 2 \, a\right ) - 1\right )} {\rm polylog}\left (3, \cos \left (2 \, b x + 2 \, a\right ) - i \, \sin \left (2 \, b x + 2 \, a\right )\right )}{4 \, {\left (b^{3} \cos \left (2 \, b x + 2 \, a\right ) - b^{3}\right )}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int x^{2} \cot \left (b x + a\right )^{3}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [B] time = 1.01, size = 293, normalized size = 2.33 \[ \frac {2 i \polylog \left (2, {\mathrm e}^{i \left (b x +a \right )}\right ) x}{b^{2}}+\frac {2 x \left (b x \,{\mathrm e}^{2 i \left (b x +a \right )}-i {\mathrm e}^{2 i \left (b x +a \right )}+i\right )}{b^{2} \left ({\mathrm e}^{2 i \left (b x +a \right )}-1\right )^{2}}-\frac {2 \polylog \left (3, {\mathrm e}^{i \left (b x +a \right )}\right )}{b^{3}}-\frac {2 \polylog \left (3, -{\mathrm e}^{i \left (b x +a \right )}\right )}{b^{3}}-\frac {2 i a^{2} x}{b^{2}}+\frac {\ln \left (1-{\mathrm e}^{i \left (b x +a \right )}\right ) a^{2}}{b^{3}}+\frac {\ln \left ({\mathrm e}^{i \left (b x +a \right )}-1\right )}{b^{3}}+\frac {2 i \polylog \left (2, -{\mathrm e}^{i \left (b x +a \right )}\right ) x}{b^{2}}-\frac {\ln \left ({\mathrm e}^{i \left (b x +a \right )}+1\right ) x^{2}}{b}+\frac {i x^{3}}{3}-\frac {\ln \left (1-{\mathrm e}^{i \left (b x +a \right )}\right ) x^{2}}{b}-\frac {4 i a^{3}}{3 b^{3}}-\frac {2 \ln \left ({\mathrm e}^{i \left (b x +a \right )}\right )}{b^{3}}+\frac {\ln \left ({\mathrm e}^{i \left (b x +a \right )}+1\right )}{b^{3}}-\frac {a^{2} \ln \left ({\mathrm e}^{i \left (b x +a \right )}-1\right )}{b^{3}}+\frac {2 a^{2} \ln \left ({\mathrm e}^{i \left (b x +a \right )}\right )}{b^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [B] time = 1.18, size = 1216, normalized size = 9.65 \[ \text {result too large to display} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.01 \[ \int x^2\,{\mathrm {cot}\left (a+b\,x\right )}^3 \,d x \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int x^{2} \cot ^{3}{\left (a + b x \right )}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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