Integrand size = 14, antiderivative size = 43 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {1}{6} b c x^2+\frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )-\frac {1}{6} b c^3 \log \left (c^2+x^2\right ) \]
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Time = 0.02 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.286, Rules used = {4946, 269, 272, 45} \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )-\frac {1}{6} b c^3 \log \left (c^2+x^2\right )+\frac {1}{6} b c x^2 \]
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Rule 45
Rule 269
Rule 272
Rule 4946
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )+\frac {1}{3} (b c) \int \frac {x}{1+\frac {c^2}{x^2}} \, dx \\ & = \frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )+\frac {1}{3} (b c) \int \frac {x^3}{c^2+x^2} \, dx \\ & = \frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )+\frac {1}{6} (b c) \text {Subst}\left (\int \frac {x}{c^2+x} \, dx,x,x^2\right ) \\ & = \frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )+\frac {1}{6} (b c) \text {Subst}\left (\int \left (1-\frac {c^2}{c^2+x}\right ) \, dx,x,x^2\right ) \\ & = \frac {1}{6} b c x^2+\frac {1}{3} x^3 \left (a+b \arctan \left (\frac {c}{x}\right )\right )-\frac {1}{6} b c^3 \log \left (c^2+x^2\right ) \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.12 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {1}{6} b c x^2+\frac {a x^3}{3}+\frac {1}{3} b x^3 \arctan \left (\frac {c}{x}\right )-\frac {1}{6} b c^3 \log \left (c^2+x^2\right ) \]
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Time = 1.01 (sec) , antiderivative size = 47, normalized size of antiderivative = 1.09
method | result | size |
parallelrisch | \(-\frac {b \,c^{3} \ln \left (c^{2}+x^{2}\right )}{6}+\frac {b \,x^{3} \arctan \left (\frac {c}{x}\right )}{3}+\frac {x^{3} a}{3}+\frac {b c \,x^{2}}{6}-\frac {b \,c^{3}}{6}\) | \(47\) |
parts | \(\frac {x^{3} a}{3}-b \,c^{3} \left (-\frac {x^{3} \arctan \left (\frac {c}{x}\right )}{3 c^{3}}+\frac {\ln \left (1+\frac {c^{2}}{x^{2}}\right )}{6}-\frac {x^{2}}{6 c^{2}}-\frac {\ln \left (\frac {c}{x}\right )}{3}\right )\) | \(57\) |
derivativedivides | \(-c^{3} \left (-\frac {a \,x^{3}}{3 c^{3}}+b \left (-\frac {x^{3} \arctan \left (\frac {c}{x}\right )}{3 c^{3}}+\frac {\ln \left (1+\frac {c^{2}}{x^{2}}\right )}{6}-\frac {x^{2}}{6 c^{2}}-\frac {\ln \left (\frac {c}{x}\right )}{3}\right )\right )\) | \(61\) |
default | \(-c^{3} \left (-\frac {a \,x^{3}}{3 c^{3}}+b \left (-\frac {x^{3} \arctan \left (\frac {c}{x}\right )}{3 c^{3}}+\frac {\ln \left (1+\frac {c^{2}}{x^{2}}\right )}{6}-\frac {x^{2}}{6 c^{2}}-\frac {\ln \left (\frac {c}{x}\right )}{3}\right )\right )\) | \(61\) |
risch | \(\text {Expression too large to display}\) | \(692\) |
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Time = 0.26 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.93 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {1}{3} \, b x^{3} \arctan \left (\frac {c}{x}\right ) - \frac {1}{6} \, b c^{3} \log \left (c^{2} + x^{2}\right ) + \frac {1}{6} \, b c x^{2} + \frac {1}{3} \, a x^{3} \]
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Time = 0.12 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.95 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {a x^{3}}{3} - \frac {b c^{3} \log {\left (c^{2} + x^{2} \right )}}{6} + \frac {b c x^{2}}{6} + \frac {b x^{3} \operatorname {atan}{\left (\frac {c}{x} \right )}}{3} \]
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Time = 0.19 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.00 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {1}{3} \, a x^{3} + \frac {1}{6} \, {\left (2 \, x^{3} \arctan \left (\frac {c}{x}\right ) - {\left (c^{2} \log \left (c^{2} + x^{2}\right ) - x^{2}\right )} c\right )} b \]
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Time = 0.27 (sec) , antiderivative size = 69, normalized size of antiderivative = 1.60 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {{\left (2 \, b c^{4} \arctan \left (\frac {c}{x}\right ) - \frac {b c^{7} \log \left (\frac {c^{2}}{x^{2}} + 1\right )}{x^{3}} + \frac {2 \, b c^{7} \log \left (\frac {c}{x}\right )}{x^{3}} + 2 \, a c^{4} + \frac {b c^{5}}{x}\right )} x^{3}}{6 \, c^{4}} \]
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Time = 0.37 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.93 \[ \int x^2 \left (a+b \arctan \left (\frac {c}{x}\right )\right ) \, dx=\frac {a\,x^3}{3}+\frac {b\,x^3\,\mathrm {atan}\left (\frac {c}{x}\right )}{3}-\frac {b\,c^3\,\ln \left (c^2+x^2\right )}{6}+\frac {b\,c\,x^2}{6} \]
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