Optimal. Leaf size=23 \[ \frac {1}{2} x^2 \tanh ^{-1}(\tanh (a+b x))-\frac {b x^3}{6} \]
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Rubi [A] time = 0.01, antiderivative size = 23, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.222, Rules used = {6239, 30} \[ \frac {1}{2} x^2 \tanh ^{-1}(\tanh (a+b x))-\frac {b x^3}{6} \]
Antiderivative was successfully verified.
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Rule 30
Rule 6239
Rubi steps
\begin {align*} \int x \tanh ^{-1}(\tanh (a+b x)) \, dx &=\frac {1}{2} x^2 \tanh ^{-1}(\tanh (a+b x))-\frac {1}{2} b \int x^2 \, dx\\ &=-\frac {b x^3}{6}+\frac {1}{2} x^2 \tanh ^{-1}(\tanh (a+b x))\\ \end {align*}
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Mathematica [A] time = 0.02, size = 20, normalized size = 0.87 \[ -\frac {1}{6} x^2 \left (b x-3 \tanh ^{-1}(\tanh (a+b x))\right ) \]
Antiderivative was successfully verified.
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fricas [A] time = 0.62, size = 13, normalized size = 0.57 \[ \frac {1}{3} \, b x^{3} + \frac {1}{2} \, a x^{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.14, size = 13, normalized size = 0.57 \[ \frac {1}{3} \, b x^{3} + \frac {1}{2} \, a x^{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.13, size = 20, normalized size = 0.87 \[ -\frac {b \,x^{3}}{6}+\frac {x^{2} \arctanh \left (\tanh \left (b x +a \right )\right )}{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.38, size = 19, normalized size = 0.83 \[ -\frac {1}{6} \, b x^{3} + \frac {1}{2} \, x^{2} \operatorname {artanh}\left (\tanh \left (b x + a\right )\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.98, size = 19, normalized size = 0.83 \[ \frac {x^2\,\mathrm {atanh}\left (\mathrm {tanh}\left (a+b\,x\right )\right )}{2}-\frac {b\,x^3}{6} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.23, size = 19, normalized size = 0.83 \[ - \frac {b x^{3}}{6} + \frac {x^{2} \operatorname {atanh}{\left (\tanh {\left (a + b x \right )} \right )}}{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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