Integrand size = 12, antiderivative size = 126 \[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {3 b^2 \left (a+b \csc ^{-1}(c x)\right ) \log \left (1-e^{2 i \csc ^{-1}(c x)}\right )}{c^2}+\frac {3 i b^3 \operatorname {PolyLog}\left (2,e^{2 i \csc ^{-1}(c x)}\right )}{2 c^2} \]
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Time = 0.11 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.583, Rules used = {5331, 4495, 4269, 3798, 2221, 2317, 2438} \[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=-\frac {3 b^2 \log \left (1-e^{2 i \csc ^{-1}(c x)}\right ) \left (a+b \csc ^{-1}(c x)\right )}{c^2}+\frac {3 b x \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3+\frac {3 i b^3 \operatorname {PolyLog}\left (2,e^{2 i \csc ^{-1}(c x)}\right )}{2 c^2} \]
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Rule 2221
Rule 2317
Rule 2438
Rule 3798
Rule 4269
Rule 4495
Rule 5331
Rubi steps \begin{align*} \text {integral}& = -\frac {\text {Subst}\left (\int (a+b x)^3 \cot (x) \csc ^2(x) \, dx,x,\csc ^{-1}(c x)\right )}{c^2} \\ & = \frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {(3 b) \text {Subst}\left (\int (a+b x)^2 \csc ^2(x) \, dx,x,\csc ^{-1}(c x)\right )}{2 c^2} \\ & = \frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {\left (3 b^2\right ) \text {Subst}\left (\int (a+b x) \cot (x) \, dx,x,\csc ^{-1}(c x)\right )}{c^2} \\ & = \frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3+\frac {\left (6 i b^2\right ) \text {Subst}\left (\int \frac {e^{2 i x} (a+b x)}{1-e^{2 i x}} \, dx,x,\csc ^{-1}(c x)\right )}{c^2} \\ & = \frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {3 b^2 \left (a+b \csc ^{-1}(c x)\right ) \log \left (1-e^{2 i \csc ^{-1}(c x)}\right )}{c^2}+\frac {\left (3 b^3\right ) \text {Subst}\left (\int \log \left (1-e^{2 i x}\right ) \, dx,x,\csc ^{-1}(c x)\right )}{c^2} \\ & = \frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {3 b^2 \left (a+b \csc ^{-1}(c x)\right ) \log \left (1-e^{2 i \csc ^{-1}(c x)}\right )}{c^2}-\frac {\left (3 i b^3\right ) \text {Subst}\left (\int \frac {\log (1-x)}{x} \, dx,x,e^{2 i \csc ^{-1}(c x)}\right )}{2 c^2} \\ & = \frac {3 i b \left (a+b \csc ^{-1}(c x)\right )^2}{2 c^2}+\frac {3 b \sqrt {1-\frac {1}{c^2 x^2}} x \left (a+b \csc ^{-1}(c x)\right )^2}{2 c}+\frac {1}{2} x^2 \left (a+b \csc ^{-1}(c x)\right )^3-\frac {3 b^2 \left (a+b \csc ^{-1}(c x)\right ) \log \left (1-e^{2 i \csc ^{-1}(c x)}\right )}{c^2}+\frac {3 i b^3 \operatorname {PolyLog}\left (2,e^{2 i \csc ^{-1}(c x)}\right )}{2 c^2} \\ \end{align*}
Time = 0.47 (sec) , antiderivative size = 182, normalized size of antiderivative = 1.44 \[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\frac {3 b^2 \left (a c^2 x^2+b \left (i+c \sqrt {1-\frac {1}{c^2 x^2}} x\right )\right ) \csc ^{-1}(c x)^2+b^3 c^2 x^2 \csc ^{-1}(c x)^3+3 b \csc ^{-1}(c x) \left (a c x \left (2 b \sqrt {1-\frac {1}{c^2 x^2}}+a c x\right )-2 b^2 \log \left (1-e^{2 i \csc ^{-1}(c x)}\right )\right )+a \left (a c x \left (3 b \sqrt {1-\frac {1}{c^2 x^2}}+a c x\right )-6 b^2 \log \left (\frac {1}{c x}\right )\right )+3 i b^3 \operatorname {PolyLog}\left (2,e^{2 i \csc ^{-1}(c x)}\right )}{2 c^2} \]
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 302 vs. \(2 (142 ) = 284\).
Time = 1.59 (sec) , antiderivative size = 303, normalized size of antiderivative = 2.40
method | result | size |
derivativedivides | \(\frac {\frac {c^{2} x^{2} a^{3}}{2}+b^{3} \left (\frac {\operatorname {arccsc}\left (c x \right )^{2} \left (c^{2} x^{2} \operatorname {arccsc}\left (c x \right )+3 x c \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-3 i\right )}{2}-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1-\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1+\frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {arccsc}\left (c x \right )^{2}+3 i \operatorname {polylog}\left (2, \frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {polylog}\left (2, -\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )\right )+3 a \,b^{2} \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )^{2}}{2}+\operatorname {arccsc}\left (c x \right ) c x \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-\ln \left (\frac {1}{c x}\right )\right )+3 a^{2} b \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )}{2}+\frac {c^{2} x^{2}-1}{2 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, c x}\right )}{c^{2}}\) | \(303\) |
default | \(\frac {\frac {c^{2} x^{2} a^{3}}{2}+b^{3} \left (\frac {\operatorname {arccsc}\left (c x \right )^{2} \left (c^{2} x^{2} \operatorname {arccsc}\left (c x \right )+3 x c \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-3 i\right )}{2}-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1-\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1+\frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {arccsc}\left (c x \right )^{2}+3 i \operatorname {polylog}\left (2, \frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {polylog}\left (2, -\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )\right )+3 a \,b^{2} \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )^{2}}{2}+\operatorname {arccsc}\left (c x \right ) c x \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-\ln \left (\frac {1}{c x}\right )\right )+3 a^{2} b \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )}{2}+\frac {c^{2} x^{2}-1}{2 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, c x}\right )}{c^{2}}\) | \(303\) |
parts | \(\frac {a^{3} x^{2}}{2}+\frac {b^{3} \left (\frac {\operatorname {arccsc}\left (c x \right )^{2} \left (c^{2} x^{2} \operatorname {arccsc}\left (c x \right )+3 x c \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-3 i\right )}{2}-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1-\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )-3 \,\operatorname {arccsc}\left (c x \right ) \ln \left (1+\frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {arccsc}\left (c x \right )^{2}+3 i \operatorname {polylog}\left (2, \frac {i}{c x}+\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )+3 i \operatorname {polylog}\left (2, -\frac {i}{c x}-\sqrt {1-\frac {1}{c^{2} x^{2}}}\right )\right )}{c^{2}}+\frac {3 a \,b^{2} \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )^{2}}{2}+\operatorname {arccsc}\left (c x \right ) c x \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}-\ln \left (\frac {1}{c x}\right )\right )}{c^{2}}+\frac {3 a^{2} b \left (\frac {c^{2} x^{2} \operatorname {arccsc}\left (c x \right )}{2}+\frac {c^{2} x^{2}-1}{2 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, c x}\right )}{c^{2}}\) | \(305\) |
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\[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\int { {\left (b \operatorname {arccsc}\left (c x\right ) + a\right )}^{3} x \,d x } \]
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\[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\int x \left (a + b \operatorname {acsc}{\left (c x \right )}\right )^{3}\, dx \]
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\[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\int { {\left (b \operatorname {arccsc}\left (c x\right ) + a\right )}^{3} x \,d x } \]
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\[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\int { {\left (b \operatorname {arccsc}\left (c x\right ) + a\right )}^{3} x \,d x } \]
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Timed out. \[ \int x \left (a+b \csc ^{-1}(c x)\right )^3 \, dx=\int x\,{\left (a+b\,\mathrm {asin}\left (\frac {1}{c\,x}\right )\right )}^3 \,d x \]
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