Optimal. Leaf size=59 \[ \frac {16 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}{3 b^3}-\frac {8 x}{3 b^2 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}} \]
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Rubi [A] time = 0.03, antiderivative size = 59, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {2168, 2157, 30} \[ -\frac {8 x}{3 b^2 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}+\frac {16 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}{3 b^3}-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}} \]
Antiderivative was successfully verified.
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Rule 30
Rule 2157
Rule 2168
Rubi steps
\begin {align*} \int \frac {x^2}{\tanh ^{-1}(\tanh (a+b x))^{5/2}} \, dx &=-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}}+\frac {4 \int \frac {x}{\tanh ^{-1}(\tanh (a+b x))^{3/2}} \, dx}{3 b}\\ &=-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}}-\frac {8 x}{3 b^2 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}+\frac {8 \int \frac {1}{\sqrt {\tanh ^{-1}(\tanh (a+b x))}} \, dx}{3 b^2}\\ &=-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}}-\frac {8 x}{3 b^2 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}+\frac {8 \operatorname {Subst}\left (\int \frac {1}{\sqrt {x}} \, dx,x,\tanh ^{-1}(\tanh (a+b x))\right )}{3 b^3}\\ &=-\frac {2 x^2}{3 b \tanh ^{-1}(\tanh (a+b x))^{3/2}}-\frac {8 x}{3 b^2 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}+\frac {16 \sqrt {\tanh ^{-1}(\tanh (a+b x))}}{3 b^3}\\ \end {align*}
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Mathematica [A] time = 0.05, size = 48, normalized size = 0.81 \[ -\frac {2 \left (4 b x \tanh ^{-1}(\tanh (a+b x))-8 \tanh ^{-1}(\tanh (a+b x))^2+b^2 x^2\right )}{3 b^3 \tanh ^{-1}(\tanh (a+b x))^{3/2}} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.42, size = 52, normalized size = 0.88 \[ \frac {2 \, {\left (3 \, b^{2} x^{2} + 12 \, a b x + 8 \, a^{2}\right )} \sqrt {b x + a}}{3 \, {\left (b^{5} x^{2} + 2 \, a b^{4} x + a^{2} b^{3}\right )}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.32, size = 39, normalized size = 0.66 \[ \frac {2 \, \sqrt {b x + a}}{b^{3}} + \frac {2 \, {\left (6 \, {\left (b x + a\right )} a - a^{2}\right )}}{3 \, {\left (b x + a\right )}^{\frac {3}{2}} b^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.15, size = 91, normalized size = 1.54 \[ \frac {2 \sqrt {\arctanh \left (\tanh \left (b x +a \right )\right )}-\frac {2 \left (-2 \arctanh \left (\tanh \left (b x +a \right )\right )+2 b x \right )}{\sqrt {\arctanh \left (\tanh \left (b x +a \right )\right )}}-\frac {2 \left (a^{2}+2 a \left (\arctanh \left (\tanh \left (b x +a \right )\right )-b x -a \right )+\left (\arctanh \left (\tanh \left (b x +a \right )\right )-b x -a \right )^{2}\right )}{3 \arctanh \left (\tanh \left (b x +a \right )\right )^{\frac {3}{2}}}}{b^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.54, size = 42, normalized size = 0.71 \[ \frac {2 \, {\left (3 \, b^{3} x^{3} + 15 \, a b^{2} x^{2} + 20 \, a^{2} b x + 8 \, a^{3}\right )}}{3 \, {\left (b x + a\right )}^{\frac {5}{2}} b^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 1.26, size = 259, normalized size = 4.39 \[ \frac {8\,\sqrt {\frac {\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )}{2}-\frac {\ln \left (\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )}{2}}\,\left (-b^2\,x^2-2\,b\,x\,\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )+2\,b\,x\,\ln \left (\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )+2\,{\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )}^2-4\,\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )\,\ln \left (\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )+2\,{\ln \left (\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )}^2\right )}{3\,b^3\,{\left (\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )-\ln \left (\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}+1}\right )\right )}^2} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F(-2)] time = 0.00, size = 0, normalized size = 0.00 \[ \text {Exception raised: TypeError} \]
Verification of antiderivative is not currently implemented for this CAS.
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