Optimal. Leaf size=41 \[ \text {ArcTan}(x)^2-\frac {\text {ArcTan}(x) \log \left (1+x^2\right )}{x}-\frac {1}{4} \log ^2\left (1+x^2\right )-\frac {1}{2} \text {PolyLog}\left (2,-x^2\right ) \]
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Rubi [A]
time = 0.09, antiderivative size = 41, normalized size of antiderivative = 1.00, number of steps
used = 8, number of rules used = 12, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.000, Rules used = {4946, 272, 36,
29, 31, 5137, 2525, 2457, 2437, 2338, 2438, 5004} \begin {gather*} -\frac {\text {ArcTan}(x) \log \left (x^2+1\right )}{x}+\text {ArcTan}(x)^2-\frac {\text {Li}_2\left (-x^2\right )}{2}-\frac {1}{4} \log ^2\left (x^2+1\right ) \end {gather*}
Antiderivative was successfully verified.
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Rule 29
Rule 31
Rule 36
Rule 272
Rule 2338
Rule 2437
Rule 2438
Rule 2457
Rule 2525
Rule 4946
Rule 5004
Rule 5137
Rubi steps
\begin {align*} \int \frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x^2} \, dx &=-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}+2 \int \frac {\tan ^{-1}(x)}{1+x^2} \, dx+\int \frac {\log \left (1+x^2\right )}{x \left (1+x^2\right )} \, dx\\ &=\tan ^{-1}(x)^2-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}+\frac {1}{2} \text {Subst}\left (\int \frac {\log (1+x)}{x (1+x)} \, dx,x,x^2\right )\\ &=\tan ^{-1}(x)^2-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}+\frac {1}{2} \text {Subst}\left (\int \left (\frac {\log (1+x)}{-1-x}+\frac {\log (1+x)}{x}\right ) \, dx,x,x^2\right )\\ &=\tan ^{-1}(x)^2-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}+\frac {1}{2} \text {Subst}\left (\int \frac {\log (1+x)}{-1-x} \, dx,x,x^2\right )+\frac {1}{2} \text {Subst}\left (\int \frac {\log (1+x)}{x} \, dx,x,x^2\right )\\ &=\tan ^{-1}(x)^2-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}-\frac {\text {Li}_2\left (-x^2\right )}{2}-\frac {1}{2} \text {Subst}\left (\int \frac {\log (x)}{x} \, dx,x,1+x^2\right )\\ &=\tan ^{-1}(x)^2-\frac {\tan ^{-1}(x) \log \left (1+x^2\right )}{x}-\frac {1}{4} \log ^2\left (1+x^2\right )-\frac {\text {Li}_2\left (-x^2\right )}{2}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 41, normalized size = 1.00 \begin {gather*} \text {ArcTan}(x)^2-\frac {\text {ArcTan}(x) \log \left (1+x^2\right )}{x}-\frac {1}{4} \log ^2\left (1+x^2\right )-\frac {1}{2} \text {PolyLog}\left (2,-x^2\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 7.56, size = 0, normalized size = 0.00 \[\int \frac {\arctan \left (x \right ) \ln \left (x^{2}+1\right )}{x^{2}}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.48, size = 58, normalized size = 1.41 \begin {gather*} -{\left (\frac {\log \left (x^{2} + 1\right )}{x} - 2 \, \arctan \left (x\right )\right )} \arctan \left (x\right ) - \arctan \left (x\right )^{2} + \frac {1}{2} \, \log \left (-x^{2}\right ) \log \left (x^{2} + 1\right ) - \frac {1}{4} \, \log \left (x^{2} + 1\right )^{2} + \frac {1}{2} \, {\rm Li}_2\left (x^{2} + 1\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [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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Sympy [C] Result contains complex when optimal does not.
time = 55.39, size = 37, normalized size = 0.90 \begin {gather*} - \frac {\log {\left (x^{2} + 1 \right )}^{2}}{4} + \operatorname {atan}^{2}{\left (x \right )} - \frac {\operatorname {Li}_{2}\left (x^{2} e^{i \pi }\right )}{2} - \frac {\log {\left (x^{2} + 1 \right )} \operatorname {atan}{\left (x \right )}}{x} \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 = 0.11, size = 36, normalized size = 0.88 \begin {gather*} {\mathrm {atan}\left (x\right )}^2-\frac {{\ln \left (x^2+1\right )}^2}{4}-\frac {{\mathrm {Li}}_{\mathrm {2}}\left (x^2+1\right )}{2}-\frac {\ln \left (x^2+1\right )\,\mathrm {atan}\left (x\right )}{x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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