Optimal. Leaf size=39 \[ -\frac {\tan ^{-1}(x)}{x}-\frac {1}{2} \tan ^{-1}(x)^2-\frac {\tan ^{-1}(x)^2}{2 x^2}+\log (x)-\frac {1}{2} \log \left (1+x^2\right ) \]
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Rubi [A]
time = 0.05, antiderivative size = 39, normalized size of antiderivative = 1.00, number of steps
used = 8, number of rules used = 7, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.875, Rules used = {4946, 5038, 272,
36, 29, 31, 5004} \begin {gather*} -\frac {\text {ArcTan}(x)^2}{2 x^2}-\frac {\text {ArcTan}(x)^2}{2}-\frac {\text {ArcTan}(x)}{x}-\frac {1}{2} \log \left (x^2+1\right )+\log (x) \end {gather*}
Antiderivative was successfully verified.
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Rule 29
Rule 31
Rule 36
Rule 272
Rule 4946
Rule 5004
Rule 5038
Rubi steps
\begin {align*} \int \frac {\tan ^{-1}(x)^2}{x^3} \, dx &=-\frac {\tan ^{-1}(x)^2}{2 x^2}+\int \frac {\tan ^{-1}(x)}{x^2 \left (1+x^2\right )} \, dx\\ &=-\frac {\tan ^{-1}(x)^2}{2 x^2}+\int \frac {\tan ^{-1}(x)}{x^2} \, dx-\int \frac {\tan ^{-1}(x)}{1+x^2} \, dx\\ &=-\frac {\tan ^{-1}(x)}{x}-\frac {1}{2} \tan ^{-1}(x)^2-\frac {\tan ^{-1}(x)^2}{2 x^2}+\int \frac {1}{x \left (1+x^2\right )} \, dx\\ &=-\frac {\tan ^{-1}(x)}{x}-\frac {1}{2} \tan ^{-1}(x)^2-\frac {\tan ^{-1}(x)^2}{2 x^2}+\frac {1}{2} \text {Subst}\left (\int \frac {1}{x (1+x)} \, dx,x,x^2\right )\\ &=-\frac {\tan ^{-1}(x)}{x}-\frac {1}{2} \tan ^{-1}(x)^2-\frac {\tan ^{-1}(x)^2}{2 x^2}+\frac {1}{2} \text {Subst}\left (\int \frac {1}{x} \, dx,x,x^2\right )-\frac {1}{2} \text {Subst}\left (\int \frac {1}{1+x} \, dx,x,x^2\right )\\ &=-\frac {\tan ^{-1}(x)}{x}-\frac {1}{2} \tan ^{-1}(x)^2-\frac {\tan ^{-1}(x)^2}{2 x^2}+\log (x)-\frac {1}{2} \log \left (1+x^2\right )\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 38, normalized size = 0.97 \begin {gather*} -\frac {\tan ^{-1}(x)}{x}+\frac {\left (-1-x^2\right ) \tan ^{-1}(x)^2}{2 x^2}+\log (x)-\frac {1}{2} \log \left (1+x^2\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.07, size = 34, normalized size = 0.87
method | result | size |
default | \(-\frac {\arctan \left (x \right )}{x}-\frac {\arctan \left (x \right )^{2}}{2}-\frac {\arctan \left (x \right )^{2}}{2 x^{2}}+\ln \left (x \right )-\frac {\ln \left (x^{2}+1\right )}{2}\) | \(34\) |
risch | \(\frac {\left (x^{2}+1\right ) \ln \left (i x +1\right )^{2}}{8 x^{2}}-\frac {\left (x^{2} \ln \left (-i x +1\right )-2 i x +\ln \left (-i x +1\right )\right ) \ln \left (i x +1\right )}{4 x^{2}}+\frac {x^{2} \ln \left (-i x +1\right )^{2}+8 x^{2} \ln \left (x \right )-4 x^{2} \ln \left (x^{2}+1\right )-4 i x \ln \left (-i x +1\right )+\ln \left (-i x +1\right )^{2}}{8 x^{2}}\) | \(113\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 3.77, size = 36, normalized size = 0.92 \begin {gather*} -{\left (\frac {1}{x} + \arctan \left (x\right )\right )} \arctan \left (x\right ) + \frac {1}{2} \, \arctan \left (x\right )^{2} - \frac {\arctan \left (x\right )^{2}}{2 \, x^{2}} - \frac {1}{2} \, \log \left (x^{2} + 1\right ) + \log \left (x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.58, size = 38, normalized size = 0.97 \begin {gather*} -\frac {{\left (x^{2} + 1\right )} \arctan \left (x\right )^{2} + x^{2} \log \left (x^{2} + 1\right ) - 2 \, x^{2} \log \left (x\right ) + 2 \, x \arctan \left (x\right )}{2 \, x^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.19, size = 32, normalized size = 0.82 \begin {gather*} \log {\left (x \right )} - \frac {\log {\left (x^{2} + 1 \right )}}{2} - \frac {\operatorname {atan}^{2}{\left (x \right )}}{2} - \frac {\operatorname {atan}{\left (x \right )}}{x} - \frac {\operatorname {atan}^{2}{\left (x \right )}}{2 x^{2}} \end {gather*}
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 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.07, size = 31, normalized size = 0.79 \begin {gather*} \ln \left (x\right )-\frac {\ln \left (x^2+1\right )}{2}-\frac {\mathrm {atan}\left (x\right )}{x}-{\mathrm {atan}\left (x\right )}^2\,\left (\frac {1}{2\,x^2}+\frac {1}{2}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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