Optimal. Leaf size=40 \[ \frac {x}{4 a}-\frac {a x^3}{12}-\frac {\left (1-a^2 x^2\right )^2 \tanh ^{-1}(a x)}{4 a^2} \]
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Rubi [A]
time = 0.02, antiderivative size = 40, normalized size of antiderivative = 1.00, number of steps
used = 2, number of rules used = 1, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.062, Rules used = {6141}
\begin {gather*} -\frac {\left (1-a^2 x^2\right )^2 \tanh ^{-1}(a x)}{4 a^2}-\frac {a x^3}{12}+\frac {x}{4 a} \end {gather*}
Antiderivative was successfully verified.
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Rule 6141
Rubi steps
\begin {align*} \int x \left (1-a^2 x^2\right ) \tanh ^{-1}(a x) \, dx &=-\frac {\left (1-a^2 x^2\right )^2 \tanh ^{-1}(a x)}{4 a^2}+\frac {\int \left (1-a^2 x^2\right ) \, dx}{4 a}\\ &=\frac {x}{4 a}-\frac {a x^3}{12}-\frac {\left (1-a^2 x^2\right )^2 \tanh ^{-1}(a x)}{4 a^2}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 69, normalized size = 1.72 \begin {gather*} \frac {x}{4 a}-\frac {a x^3}{12}+\frac {1}{2} x^2 \tanh ^{-1}(a x)-\frac {1}{4} a^2 x^4 \tanh ^{-1}(a x)+\frac {\log (1-a x)}{8 a^2}-\frac {\log (1+a x)}{8 a^2} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.38, size = 48, normalized size = 1.20
method | result | size |
derivativedivides | \(\frac {-\frac {a^{4} x^{4} \arctanh \left (a x \right )}{4}+\frac {a^{2} x^{2} \arctanh \left (a x \right )}{2}-\frac {\arctanh \left (a x \right )}{4}-\frac {a^{3} x^{3}}{12}+\frac {a x}{4}}{a^{2}}\) | \(48\) |
default | \(\frac {-\frac {a^{4} x^{4} \arctanh \left (a x \right )}{4}+\frac {a^{2} x^{2} \arctanh \left (a x \right )}{2}-\frac {\arctanh \left (a x \right )}{4}-\frac {a^{3} x^{3}}{12}+\frac {a x}{4}}{a^{2}}\) | \(48\) |
risch | \(-\frac {\left (a^{2} x^{2}-1\right )^{2} \ln \left (a x +1\right )}{8 a^{2}}+\frac {a^{2} x^{4} \ln \left (-a x +1\right )}{8}-\frac {x^{3} a}{12}-\frac {x^{2} \ln \left (-a x +1\right )}{4}+\frac {x}{4 a}+\frac {\ln \left (a x -1\right )}{8 a^{2}}\) | \(74\) |
meijerg | \(\frac {i \left (\frac {i x a \left (5 a^{2} x^{2}+15\right )}{15}+\frac {i x a \left (-5 a^{4} x^{4}+5\right ) \left (\ln \left (1-\sqrt {a^{2} x^{2}}\right )-\ln \left (1+\sqrt {a^{2} x^{2}}\right )\right )}{10 \sqrt {a^{2} x^{2}}}\right )}{4 a^{2}}+\frac {i \left (-2 i x a +2 i \left (-a x +1\right ) \left (a x +1\right ) \arctanh \left (a x \right )\right )}{4 a^{2}}\) | \(107\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.26, size = 37, normalized size = 0.92 \begin {gather*} -\frac {{\left (a^{2} x^{2} - 1\right )}^{2} \operatorname {artanh}\left (a x\right )}{4 \, a^{2}} - \frac {a^{2} x^{3} - 3 \, x}{12 \, a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.36, size = 52, normalized size = 1.30 \begin {gather*} -\frac {2 \, a^{3} x^{3} - 6 \, a x + 3 \, {\left (a^{4} x^{4} - 2 \, a^{2} x^{2} + 1\right )} \log \left (-\frac {a x + 1}{a x - 1}\right )}{24 \, a^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.24, size = 46, normalized size = 1.15 \begin {gather*} \begin {cases} - \frac {a^{2} x^{4} \operatorname {atanh}{\left (a x \right )}}{4} - \frac {a x^{3}}{12} + \frac {x^{2} \operatorname {atanh}{\left (a x \right )}}{2} + \frac {x}{4 a} - \frac {\operatorname {atanh}{\left (a x \right )}}{4 a^{2}} & \text {for}\: a \neq 0 \\0 & \text {otherwise} \end {cases} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 160 vs.
\(2 (33) = 66\).
time = 0.40, size = 160, normalized size = 4.00 \begin {gather*} -\frac {1}{3} \, a {\left (\frac {\frac {3 \, {\left (a x + 1\right )}}{a x - 1} - 1}{a^{3} {\left (\frac {a x + 1}{a x - 1} - 1\right )}^{3}} + \frac {6 \, {\left (a x + 1\right )}^{2} \log \left (-\frac {\frac {a {\left (\frac {a x + 1}{a x - 1} + 1\right )}}{\frac {{\left (a x + 1\right )} a}{a x - 1} - a} + 1}{\frac {a {\left (\frac {a x + 1}{a x - 1} + 1\right )}}{\frac {{\left (a x + 1\right )} a}{a x - 1} - a} - 1}\right )}{{\left (a x - 1\right )}^{2} a^{3} {\left (\frac {a x + 1}{a x - 1} - 1\right )}^{4}}\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.86, size = 44, normalized size = 1.10 \begin {gather*} \frac {x^2\,\mathrm {atanh}\left (a\,x\right )}{2}-\frac {\frac {\mathrm {atanh}\left (a\,x\right )}{4}-\frac {a\,x}{4}}{a^2}-\frac {a\,x^3}{12}-\frac {a^2\,x^4\,\mathrm {atanh}\left (a\,x\right )}{4} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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