Integrand size = 20, antiderivative size = 211 \[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=-\frac {c x^2}{20 a}+\frac {c x \arctan (a x)}{10 a^2}+\frac {1}{10} c x^3 \arctan (a x)-\frac {c \arctan (a x)^2}{20 a^3}-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {2 i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \operatorname {PolyLog}\left (3,1-\frac {2}{1+i a x}\right )}{5 a^3} \]
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Time = 0.68 (sec) , antiderivative size = 211, normalized size of antiderivative = 1.00, number of steps used = 34, number of rules used = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.600, Rules used = {5070, 4946, 5036, 4930, 266, 5004, 5040, 4964, 5114, 6745, 272, 45} \[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=-\frac {2 i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{i a x+1}\right )}{5 a^3}-\frac {2 i c \arctan (a x)^3}{15 a^3}-\frac {c \arctan (a x)^2}{20 a^3}-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \operatorname {PolyLog}\left (3,1-\frac {2}{i a x+1}\right )}{5 a^3}+\frac {1}{5} a^2 c x^5 \arctan (a x)^3+\frac {c x \arctan (a x)}{10 a^2}-\frac {3}{20} a c x^4 \arctan (a x)^2+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{10} c x^3 \arctan (a x)-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {c x^2}{20 a} \]
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Rule 45
Rule 266
Rule 272
Rule 4930
Rule 4946
Rule 4964
Rule 5004
Rule 5036
Rule 5040
Rule 5070
Rule 5114
Rule 6745
Rubi steps \begin{align*} \text {integral}& = c \int x^2 \arctan (a x)^3 \, dx+\left (a^2 c\right ) \int x^4 \arctan (a x)^3 \, dx \\ & = \frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-(a c) \int \frac {x^3 \arctan (a x)^2}{1+a^2 x^2} \, dx-\frac {1}{5} \left (3 a^3 c\right ) \int \frac {x^5 \arctan (a x)^2}{1+a^2 x^2} \, dx \\ & = \frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {c \int x \arctan (a x)^2 \, dx}{a}+\frac {c \int \frac {x \arctan (a x)^2}{1+a^2 x^2} \, dx}{a}-\frac {1}{5} (3 a c) \int x^3 \arctan (a x)^2 \, dx+\frac {1}{5} (3 a c) \int \frac {x^3 \arctan (a x)^2}{1+a^2 x^2} \, dx \\ & = -\frac {c x^2 \arctan (a x)^2}{2 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {i c \arctan (a x)^3}{3 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3+c \int \frac {x^2 \arctan (a x)}{1+a^2 x^2} \, dx-\frac {c \int \frac {\arctan (a x)^2}{i-a x} \, dx}{a^2}+\frac {(3 c) \int x \arctan (a x)^2 \, dx}{5 a}-\frac {(3 c) \int \frac {x \arctan (a x)^2}{1+a^2 x^2} \, dx}{5 a}+\frac {1}{10} \left (3 a^2 c\right ) \int \frac {x^4 \arctan (a x)}{1+a^2 x^2} \, dx \\ & = -\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{a^3}+\frac {1}{10} (3 c) \int x^2 \arctan (a x) \, dx-\frac {1}{10} (3 c) \int \frac {x^2 \arctan (a x)}{1+a^2 x^2} \, dx-\frac {1}{5} (3 c) \int \frac {x^2 \arctan (a x)}{1+a^2 x^2} \, dx+\frac {(3 c) \int \frac {\arctan (a x)^2}{i-a x} \, dx}{5 a^2}+\frac {c \int \arctan (a x) \, dx}{a^2}-\frac {c \int \frac {\arctan (a x)}{1+a^2 x^2} \, dx}{a^2}+\frac {(2 c) \int \frac {\arctan (a x) \log \left (\frac {2}{1+i a x}\right )}{1+a^2 x^2} \, dx}{a^2} \\ & = \frac {c x \arctan (a x)}{a^2}+\frac {1}{10} c x^3 \arctan (a x)-\frac {c \arctan (a x)^2}{2 a^3}-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{a^3}+\frac {(i c) \int \frac {\operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{1+a^2 x^2} \, dx}{a^2}-\frac {(3 c) \int \arctan (a x) \, dx}{10 a^2}+\frac {(3 c) \int \frac {\arctan (a x)}{1+a^2 x^2} \, dx}{10 a^2}-\frac {(3 c) \int \arctan (a x) \, dx}{5 a^2}+\frac {(3 c) \int \frac {\arctan (a x)}{1+a^2 x^2} \, dx}{5 a^2}-\frac {(6 c) \int \frac {\arctan (a x) \log \left (\frac {2}{1+i a x}\right )}{1+a^2 x^2} \, dx}{5 a^2}-\frac {c \int \frac {x}{1+a^2 x^2} \, dx}{a}-\frac {1}{10} (a c) \int \frac {x^3}{1+a^2 x^2} \, dx \\ & = \frac {c x \arctan (a x)}{10 a^2}+\frac {1}{10} c x^3 \arctan (a x)-\frac {c \arctan (a x)^2}{20 a^3}-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \log \left (1+a^2 x^2\right )}{2 a^3}-\frac {2 i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \operatorname {PolyLog}\left (3,1-\frac {2}{1+i a x}\right )}{2 a^3}-\frac {(3 i c) \int \frac {\operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{1+a^2 x^2} \, dx}{5 a^2}+\frac {(3 c) \int \frac {x}{1+a^2 x^2} \, dx}{10 a}+\frac {(3 c) \int \frac {x}{1+a^2 x^2} \, dx}{5 a}-\frac {1}{20} (a c) \text {Subst}\left (\int \frac {x}{1+a^2 x} \, dx,x,x^2\right ) \\ & = \frac {c x \arctan (a x)}{10 a^2}+\frac {1}{10} c x^3 \arctan (a x)-\frac {c \arctan (a x)^2}{20 a^3}-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \log \left (1+a^2 x^2\right )}{20 a^3}-\frac {2 i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \operatorname {PolyLog}\left (3,1-\frac {2}{1+i a x}\right )}{5 a^3}-\frac {1}{20} (a c) \text {Subst}\left (\int \left (\frac {1}{a^2}-\frac {1}{a^2 \left (1+a^2 x\right )}\right ) \, dx,x,x^2\right ) \\ & = -\frac {c x^2}{20 a}+\frac {c x \arctan (a x)}{10 a^2}+\frac {1}{10} c x^3 \arctan (a x)-\frac {c \arctan (a x)^2}{20 a^3}-\frac {c x^2 \arctan (a x)^2}{5 a}-\frac {3}{20} a c x^4 \arctan (a x)^2-\frac {2 i c \arctan (a x)^3}{15 a^3}+\frac {1}{3} c x^3 \arctan (a x)^3+\frac {1}{5} a^2 c x^5 \arctan (a x)^3-\frac {2 c \arctan (a x)^2 \log \left (\frac {2}{1+i a x}\right )}{5 a^3}-\frac {2 i c \arctan (a x) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i a x}\right )}{5 a^3}-\frac {c \operatorname {PolyLog}\left (3,1-\frac {2}{1+i a x}\right )}{5 a^3} \\ \end{align*}
Time = 0.49 (sec) , antiderivative size = 171, normalized size of antiderivative = 0.81 \[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=\frac {c \left (-3-3 a^2 x^2+6 a x \arctan (a x)+6 a^3 x^3 \arctan (a x)-3 \arctan (a x)^2-12 a^2 x^2 \arctan (a x)^2-9 a^4 x^4 \arctan (a x)^2+8 i \arctan (a x)^3+20 a^3 x^3 \arctan (a x)^3+12 a^5 x^5 \arctan (a x)^3-24 \arctan (a x)^2 \log \left (1+e^{2 i \arctan (a x)}\right )+24 i \arctan (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arctan (a x)}\right )-12 \operatorname {PolyLog}\left (3,-e^{2 i \arctan (a x)}\right )\right )}{60 a^3} \]
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Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 46.49 (sec) , antiderivative size = 900, normalized size of antiderivative = 4.27
method | result | size |
derivativedivides | \(\text {Expression too large to display}\) | \(900\) |
default | \(\text {Expression too large to display}\) | \(900\) |
parts | \(\text {Expression too large to display}\) | \(902\) |
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\[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=\int { {\left (a^{2} c x^{2} + c\right )} x^{2} \arctan \left (a x\right )^{3} \,d x } \]
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\[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=c \left (\int x^{2} \operatorname {atan}^{3}{\left (a x \right )}\, dx + \int a^{2} x^{4} \operatorname {atan}^{3}{\left (a x \right )}\, dx\right ) \]
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\[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=\int { {\left (a^{2} c x^{2} + c\right )} x^{2} \arctan \left (a x\right )^{3} \,d x } \]
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\[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=\int { {\left (a^{2} c x^{2} + c\right )} x^{2} \arctan \left (a x\right )^{3} \,d x } \]
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Timed out. \[ \int x^2 \left (c+a^2 c x^2\right ) \arctan (a x)^3 \, dx=\int x^2\,{\mathrm {atan}\left (a\,x\right )}^3\,\left (c\,a^2\,x^2+c\right ) \,d x \]
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