Integrand size = 12, antiderivative size = 263 \[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=-\frac {a x}{b^3}+\frac {(a+b x)^2}{12 b^4}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a \left (1+a^2\right ) \coth ^{-1}(a+b x)^2}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {2 a \left (1+a^2\right ) \coth ^{-1}(a+b x) \log \left (\frac {2}{1-a-b x}\right )}{b^4}+\frac {\log \left (1-(a+b x)^2\right )}{12 b^4}+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}+\frac {a \left (1+a^2\right ) \operatorname {PolyLog}\left (2,-\frac {1+a+b x}{1-a-b x}\right )}{b^4} \]
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Time = 0.29 (sec) , antiderivative size = 263, normalized size of antiderivative = 1.00, number of steps used = 19, number of rules used = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.250, Rules used = {6247, 6066, 6022, 266, 6038, 327, 212, 272, 45, 6196, 6096, 6132, 6056, 2449, 2352} \[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\frac {a \left (a^2+1\right ) \operatorname {PolyLog}\left (2,-\frac {a+b x+1}{-a-b x+1}\right )}{b^4}+\frac {\left (6 a^2+1\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}-\frac {a \left (a^2+1\right ) \coth ^{-1}(a+b x)^2}{b^4}+\frac {\left (6 a^2+1\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}+\frac {2 a \left (a^2+1\right ) \log \left (\frac {2}{-a-b x+1}\right ) \coth ^{-1}(a+b x)}{b^4}-\frac {\left (a^4+6 a^2+1\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {(a+b x)^2}{12 b^4}+\frac {\log \left (1-(a+b x)^2\right )}{12 b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}-\frac {a x}{b^3}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2 \]
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Rule 45
Rule 212
Rule 266
Rule 272
Rule 327
Rule 2352
Rule 2449
Rule 6022
Rule 6038
Rule 6056
Rule 6066
Rule 6096
Rule 6132
Rule 6196
Rule 6247
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \left (-\frac {a}{b}+\frac {x}{b}\right )^3 \coth ^{-1}(x)^2 \, dx,x,a+b x\right )}{b} \\ & = \frac {1}{4} x^4 \coth ^{-1}(a+b x)^2-\frac {1}{2} \text {Subst}\left (\int \left (-\frac {\left (1+6 a^2\right ) \coth ^{-1}(x)}{b^4}+\frac {4 a x \coth ^{-1}(x)}{b^4}-\frac {x^2 \coth ^{-1}(x)}{b^4}+\frac {\left (1+6 a^2+a^4-4 a \left (1+a^2\right ) x\right ) \coth ^{-1}(x)}{b^4 \left (1-x^2\right )}\right ) \, dx,x,a+b x\right ) \\ & = \frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {\text {Subst}\left (\int x^2 \coth ^{-1}(x) \, dx,x,a+b x\right )}{2 b^4}-\frac {\text {Subst}\left (\int \frac {\left (1+6 a^2+a^4-4 a \left (1+a^2\right ) x\right ) \coth ^{-1}(x)}{1-x^2} \, dx,x,a+b x\right )}{2 b^4}-\frac {(2 a) \text {Subst}\left (\int x \coth ^{-1}(x) \, dx,x,a+b x\right )}{b^4}+\frac {\left (1+6 a^2\right ) \text {Subst}\left (\int \coth ^{-1}(x) \, dx,x,a+b x\right )}{2 b^4} \\ & = \frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2-\frac {\text {Subst}\left (\int \frac {x^3}{1-x^2} \, dx,x,a+b x\right )}{6 b^4}-\frac {\text {Subst}\left (\int \left (\frac {\left (1+a^2 \left (6+a^2\right )\right ) \coth ^{-1}(x)}{1-x^2}-\frac {4 a \left (1+a^2\right ) x \coth ^{-1}(x)}{1-x^2}\right ) \, dx,x,a+b x\right )}{2 b^4}+\frac {a \text {Subst}\left (\int \frac {x^2}{1-x^2} \, dx,x,a+b x\right )}{b^4}-\frac {\left (1+6 a^2\right ) \text {Subst}\left (\int \frac {x}{1-x^2} \, dx,x,a+b x\right )}{2 b^4} \\ & = -\frac {a x}{b^3}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}-\frac {\text {Subst}\left (\int \frac {x}{1-x} \, dx,x,(a+b x)^2\right )}{12 b^4}+\frac {a \text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,a+b x\right )}{b^4}+\frac {\left (2 a \left (1+a^2\right )\right ) \text {Subst}\left (\int \frac {x \coth ^{-1}(x)}{1-x^2} \, dx,x,a+b x\right )}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \text {Subst}\left (\int \frac {\coth ^{-1}(x)}{1-x^2} \, dx,x,a+b x\right )}{2 b^4} \\ & = -\frac {a x}{b^3}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a \left (1+a^2\right ) \coth ^{-1}(a+b x)^2}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}-\frac {\text {Subst}\left (\int \left (-1+\frac {1}{1-x}\right ) \, dx,x,(a+b x)^2\right )}{12 b^4}+\frac {\left (2 a \left (1+a^2\right )\right ) \text {Subst}\left (\int \frac {\coth ^{-1}(x)}{1-x} \, dx,x,a+b x\right )}{b^4} \\ & = -\frac {a x}{b^3}+\frac {(a+b x)^2}{12 b^4}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a \left (1+a^2\right ) \coth ^{-1}(a+b x)^2}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {2 a \left (1+a^2\right ) \coth ^{-1}(a+b x) \log \left (\frac {2}{1-a-b x}\right )}{b^4}+\frac {\log \left (1-(a+b x)^2\right )}{12 b^4}+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}-\frac {\left (2 a \left (1+a^2\right )\right ) \text {Subst}\left (\int \frac {\log \left (\frac {2}{1-x}\right )}{1-x^2} \, dx,x,a+b x\right )}{b^4} \\ & = -\frac {a x}{b^3}+\frac {(a+b x)^2}{12 b^4}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a \left (1+a^2\right ) \coth ^{-1}(a+b x)^2}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {2 a \left (1+a^2\right ) \coth ^{-1}(a+b x) \log \left (\frac {2}{1-a-b x}\right )}{b^4}+\frac {\log \left (1-(a+b x)^2\right )}{12 b^4}+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}+\frac {\left (2 a \left (1+a^2\right )\right ) \text {Subst}\left (\int \frac {\log (2 x)}{1-2 x} \, dx,x,\frac {1}{1-a-b x}\right )}{b^4} \\ & = -\frac {a x}{b^3}+\frac {(a+b x)^2}{12 b^4}+\frac {\left (1+6 a^2\right ) (a+b x) \coth ^{-1}(a+b x)}{2 b^4}-\frac {a (a+b x)^2 \coth ^{-1}(a+b x)}{b^4}+\frac {(a+b x)^3 \coth ^{-1}(a+b x)}{6 b^4}-\frac {a \left (1+a^2\right ) \coth ^{-1}(a+b x)^2}{b^4}-\frac {\left (1+6 a^2+a^4\right ) \coth ^{-1}(a+b x)^2}{4 b^4}+\frac {1}{4} x^4 \coth ^{-1}(a+b x)^2+\frac {a \text {arctanh}(a+b x)}{b^4}+\frac {2 a \left (1+a^2\right ) \coth ^{-1}(a+b x) \log \left (\frac {2}{1-a-b x}\right )}{b^4}+\frac {\log \left (1-(a+b x)^2\right )}{12 b^4}+\frac {\left (1+6 a^2\right ) \log \left (1-(a+b x)^2\right )}{4 b^4}+\frac {a \left (1+a^2\right ) \operatorname {PolyLog}\left (2,1-\frac {2}{1-a-b x}\right )}{b^4} \\ \end{align*}
Time = 1.49 (sec) , antiderivative size = 210, normalized size of antiderivative = 0.80 \[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=-\frac {1+11 a^2+10 a b x-b^2 x^2+3 \left (1-4 a+6 a^2-4 a^3+a^4-b^4 x^4\right ) \coth ^{-1}(a+b x)^2-2 \coth ^{-1}(a+b x) \left (9 a+13 a^3+3 b x+9 a^2 b x-3 a b^2 x^2+b^3 x^3+12 \left (a+a^3\right ) \log \left (1-e^{-2 \coth ^{-1}(a+b x)}\right )\right )+8 \log \left (\frac {1}{a+b x}\right )+36 a^2 \log \left (\frac {1}{a+b x}\right )+8 \log \left (\frac {1}{\sqrt {1-\frac {1}{(a+b x)^2}}}\right )+36 a^2 \log \left (\frac {1}{\sqrt {1-\frac {1}{(a+b x)^2}}}\right )+12 \left (a+a^3\right ) \operatorname {PolyLog}\left (2,e^{-2 \coth ^{-1}(a+b x)}\right )}{12 b^4} \]
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Time = 0.24 (sec) , antiderivative size = 448, normalized size of antiderivative = 1.70
method | result | size |
parts | \(\frac {x^{4} \operatorname {arccoth}\left (b x +a \right )^{2}}{4}+\frac {6 \,\operatorname {arccoth}\left (b x +a \right ) a^{2} \left (b x +a \right )-2 \,\operatorname {arccoth}\left (b x +a \right ) a \left (b x +a \right )^{2}+\frac {\operatorname {arccoth}\left (b x +a \right ) \left (b x +a \right )^{3}}{3}+\left (b x +a \right ) \operatorname {arccoth}\left (b x +a \right )+\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{4}}{2}-2 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{3}+3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{2}-2 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a +\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right )}{2}-\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{4}}{2}-2 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{3}-3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{2}-2 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a -\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right )}{2}-2 \left (b x +a \right ) a +\frac {\left (b x +a \right )^{2}}{6}+\frac {\left (18 a^{2}-6 a +4\right ) \ln \left (b x +a -1\right )}{6}-\frac {\left (-18 a^{2}-6 a -4\right ) \ln \left (b x +a +1\right )}{6}+\frac {\left (3 a^{4}-12 a^{3}+18 a^{2}-12 a +3\right ) \left (\frac {\ln \left (b x +a -1\right )^{2}}{4}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a -1\right ) \ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}\right )}{6}+\frac {\left (-3 a^{4}-12 a^{3}-18 a^{2}-12 a -3\right ) \left (\frac {\left (\ln \left (b x +a +1\right )-\ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )\right ) \ln \left (-\frac {b x}{2}-\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a +1\right )^{2}}{4}\right )}{6}}{2 b^{4}}\) | \(448\) |
derivativedivides | \(\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) a^{2} \left (b x +a \right )+\frac {3 \operatorname {arccoth}\left (b x +a \right )^{2} a^{2} \left (b x +a \right )^{2}}{2}-\operatorname {arccoth}\left (b x +a \right ) a \left (b x +a \right )^{2}-\operatorname {arccoth}\left (b x +a \right )^{2} a \left (b x +a \right )^{3}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{3}-\operatorname {arccoth}\left (b x +a \right )^{2} a^{3} \left (b x +a \right )+\frac {\left (b x +a \right )^{2}}{12}+\frac {\operatorname {arccoth}\left (b x +a \right ) \left (b x +a \right )^{3}}{6}-\left (b x +a \right ) a -\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a +\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{4}}{4}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{3}+\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{2}}{2}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a -\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{4}}{4}-\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{2}}{2}-\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right )}{4}+\frac {\left (-3 a^{4}-12 a^{3}-18 a^{2}-12 a -3\right ) \left (\frac {\left (\ln \left (b x +a +1\right )-\ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )\right ) \ln \left (-\frac {b x}{2}-\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a +1\right )^{2}}{4}\right )}{12}+\frac {\left (3 a^{4}-12 a^{3}+18 a^{2}-12 a +3\right ) \left (\frac {\ln \left (b x +a -1\right )^{2}}{4}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a -1\right ) \ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}\right )}{12}+\frac {\left (18 a^{2}-6 a +4\right ) \ln \left (b x +a -1\right )}{12}-\frac {\left (-18 a^{2}-6 a -4\right ) \ln \left (b x +a +1\right )}{12}+\frac {\operatorname {arccoth}\left (b x +a \right )^{2} a^{4}}{4}+\frac {\operatorname {arccoth}\left (b x +a \right )^{2} \left (b x +a \right )^{4}}{4}+\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right )}{4}+\frac {\left (b x +a \right ) \operatorname {arccoth}\left (b x +a \right )}{2}}{b^{4}}\) | \(520\) |
default | \(\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) a^{2} \left (b x +a \right )+\frac {3 \operatorname {arccoth}\left (b x +a \right )^{2} a^{2} \left (b x +a \right )^{2}}{2}-\operatorname {arccoth}\left (b x +a \right ) a \left (b x +a \right )^{2}-\operatorname {arccoth}\left (b x +a \right )^{2} a \left (b x +a \right )^{3}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{3}-\operatorname {arccoth}\left (b x +a \right )^{2} a^{3} \left (b x +a \right )+\frac {\left (b x +a \right )^{2}}{12}+\frac {\operatorname {arccoth}\left (b x +a \right ) \left (b x +a \right )^{3}}{6}-\left (b x +a \right ) a -\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a +\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{4}}{4}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{3}+\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a^{2}}{2}-\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right ) a -\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{4}}{4}-\frac {3 \,\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right ) a^{2}}{2}-\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a +1\right )}{4}+\frac {\left (-3 a^{4}-12 a^{3}-18 a^{2}-12 a -3\right ) \left (\frac {\left (\ln \left (b x +a +1\right )-\ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )\right ) \ln \left (-\frac {b x}{2}-\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a +1\right )^{2}}{4}\right )}{12}+\frac {\left (3 a^{4}-12 a^{3}+18 a^{2}-12 a +3\right ) \left (\frac {\ln \left (b x +a -1\right )^{2}}{4}-\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}-\frac {\ln \left (b x +a -1\right ) \ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right )}{2}\right )}{12}+\frac {\left (18 a^{2}-6 a +4\right ) \ln \left (b x +a -1\right )}{12}-\frac {\left (-18 a^{2}-6 a -4\right ) \ln \left (b x +a +1\right )}{12}+\frac {\operatorname {arccoth}\left (b x +a \right )^{2} a^{4}}{4}+\frac {\operatorname {arccoth}\left (b x +a \right )^{2} \left (b x +a \right )^{4}}{4}+\frac {\operatorname {arccoth}\left (b x +a \right ) \ln \left (b x +a -1\right )}{4}+\frac {\left (b x +a \right ) \operatorname {arccoth}\left (b x +a \right )}{2}}{b^{4}}\) | \(520\) |
risch | \(-\frac {1}{12 b^{4}}-\frac {5 a x}{6 b^{3}}-\frac {\ln \left (b x +a -1\right ) x}{4 b^{3}}+\frac {\ln \left (b x +a -1\right )^{2} a^{3}}{4 b^{4}}-\frac {3 \ln \left (b x +a -1\right )^{2} a^{2}}{8 b^{4}}+\frac {\ln \left (b x +a -1\right )^{2} a}{4 b^{4}}-\frac {\ln \left (b x +a -1\right )^{2} a^{4}}{16 b^{4}}-\frac {\ln \left (b x +a -1\right ) x^{3}}{12 b}-\frac {\left (-b^{4} x^{4}+a^{4}+4 a^{3}+6 a^{2}+4 a +1\right ) \ln \left (b x +a +1\right )^{2}}{16 b^{4}}+\frac {a}{b^{4}}-\frac {11 a^{2}}{12 b^{4}}+\frac {x^{2}}{12 b^{2}}+\frac {\ln \left (b x +a +1\right )}{3 b^{4}}+\frac {\ln \left (b x +a -1\right )^{2} x^{4}}{16}-\frac {\ln \left (b x +a -1\right )^{2}}{16 b^{4}}+\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right ) a^{3}}{b^{4}}+\frac {\operatorname {dilog}\left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right ) a}{b^{4}}+\frac {3 \ln \left (b x +a +1\right ) a^{2}}{2 b^{4}}+\frac {3 \ln \left (b x +a +1\right ) a}{4 b^{4}}+\frac {13 \ln \left (b x +a +1\right ) a^{3}}{12 b^{4}}-\frac {13 \ln \left (b x +a -1\right ) a^{3}}{12 b^{4}}+\frac {3 \ln \left (b x +a -1\right ) a^{2}}{2 b^{4}}-\frac {3 \ln \left (b x +a -1\right ) a}{4 b^{4}}+\left (-\frac {x^{4} \ln \left (b x +a -1\right )}{8}-\frac {-2 b^{3} x^{3}-3 a^{4} \ln \left (b x +a -1\right )+6 a \,b^{2} x^{2}+12 \ln \left (b x +a -1\right ) a^{3}-18 a^{2} b x -18 \ln \left (b x +a -1\right ) a^{2}+12 \ln \left (b x +a -1\right ) a -6 b x -3 \ln \left (b x +a -1\right )}{24 b^{4}}\right ) \ln \left (b x +a +1\right )+\frac {\ln \left (b x +a -1\right )}{3 b^{4}}-\frac {3 \ln \left (b x +a -1\right ) x \,a^{2}}{4 b^{3}}+\frac {\ln \left (b x +a -1\right ) x^{2} a}{4 b^{2}}+\frac {\ln \left (b x +a -1\right ) \ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right ) a}{b^{4}}+\frac {\ln \left (b x +a -1\right ) \ln \left (\frac {b x}{2}+\frac {a}{2}+\frac {1}{2}\right ) a^{3}}{b^{4}}\) | \(527\) |
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\[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\int { x^{3} \operatorname {arcoth}\left (b x + a\right )^{2} \,d x } \]
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\[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\int x^{3} \operatorname {acoth}^{2}{\left (a + b x \right )}\, dx \]
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Time = 0.19 (sec) , antiderivative size = 320, normalized size of antiderivative = 1.22 \[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\frac {1}{4} \, x^{4} \operatorname {arcoth}\left (b x + a\right )^{2} + \frac {1}{48} \, b^{2} {\left (\frac {48 \, {\left (a^{3} + a\right )} {\left (\log \left (b x + a - 1\right ) \log \left (\frac {1}{2} \, b x + \frac {1}{2} \, a + \frac {1}{2}\right ) + {\rm Li}_2\left (-\frac {1}{2} \, b x - \frac {1}{2} \, a + \frac {1}{2}\right )\right )}}{b^{6}} + \frac {4 \, {\left (13 \, a^{3} + 18 \, a^{2} + 9 \, a + 4\right )} \log \left (b x + a + 1\right )}{b^{6}} + \frac {4 \, b^{2} x^{2} - 40 \, a b x + 3 \, {\left (a^{4} + 4 \, a^{3} + 6 \, a^{2} + 4 \, a + 1\right )} \log \left (b x + a + 1\right )^{2} - 6 \, {\left (a^{4} + 4 \, a^{3} + 6 \, a^{2} + 4 \, a + 1\right )} \log \left (b x + a + 1\right ) \log \left (b x + a - 1\right ) + 3 \, {\left (a^{4} - 4 \, a^{3} + 6 \, a^{2} - 4 \, a + 1\right )} \log \left (b x + a - 1\right )^{2} - 4 \, {\left (13 \, a^{3} - 18 \, a^{2} + 9 \, a - 4\right )} \log \left (b x + a - 1\right )}{b^{6}}\right )} + \frac {1}{12} \, b {\left (\frac {2 \, {\left (b^{2} x^{3} - 3 \, a b x^{2} + 3 \, {\left (3 \, a^{2} + 1\right )} x\right )}}{b^{4}} - \frac {3 \, {\left (a^{4} + 4 \, a^{3} + 6 \, a^{2} + 4 \, a + 1\right )} \log \left (b x + a + 1\right )}{b^{5}} + \frac {3 \, {\left (a^{4} - 4 \, a^{3} + 6 \, a^{2} - 4 \, a + 1\right )} \log \left (b x + a - 1\right )}{b^{5}}\right )} \operatorname {arcoth}\left (b x + a\right ) \]
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\[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\int { x^{3} \operatorname {arcoth}\left (b x + a\right )^{2} \,d x } \]
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Timed out. \[ \int x^3 \coth ^{-1}(a+b x)^2 \, dx=\int x^3\,{\mathrm {acoth}\left (a+b\,x\right )}^2 \,d x \]
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