Optimal. Leaf size=79 \[ -\frac {\cosh ^3\left (a+b x^2\right )}{18 b^2}-\frac {\cosh \left (a+b x^2\right )}{3 b^2}+\frac {x^2 \sinh \left (a+b x^2\right )}{3 b}+\frac {x^2 \sinh \left (a+b x^2\right ) \cosh ^2\left (a+b x^2\right )}{6 b} \]
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Rubi [A] time = 0.08, antiderivative size = 79, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.286, Rules used = {5321, 3310, 3296, 2638} \[ -\frac {\cosh ^3\left (a+b x^2\right )}{18 b^2}-\frac {\cosh \left (a+b x^2\right )}{3 b^2}+\frac {x^2 \sinh \left (a+b x^2\right )}{3 b}+\frac {x^2 \sinh \left (a+b x^2\right ) \cosh ^2\left (a+b x^2\right )}{6 b} \]
Antiderivative was successfully verified.
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Rule 2638
Rule 3296
Rule 3310
Rule 5321
Rubi steps
\begin {align*} \int x^3 \cosh ^3\left (a+b x^2\right ) \, dx &=\frac {1}{2} \operatorname {Subst}\left (\int x \cosh ^3(a+b x) \, dx,x,x^2\right )\\ &=-\frac {\cosh ^3\left (a+b x^2\right )}{18 b^2}+\frac {x^2 \cosh ^2\left (a+b x^2\right ) \sinh \left (a+b x^2\right )}{6 b}+\frac {1}{3} \operatorname {Subst}\left (\int x \cosh (a+b x) \, dx,x,x^2\right )\\ &=-\frac {\cosh ^3\left (a+b x^2\right )}{18 b^2}+\frac {x^2 \sinh \left (a+b x^2\right )}{3 b}+\frac {x^2 \cosh ^2\left (a+b x^2\right ) \sinh \left (a+b x^2\right )}{6 b}-\frac {\operatorname {Subst}\left (\int \sinh (a+b x) \, dx,x,x^2\right )}{3 b}\\ &=-\frac {\cosh \left (a+b x^2\right )}{3 b^2}-\frac {\cosh ^3\left (a+b x^2\right )}{18 b^2}+\frac {x^2 \sinh \left (a+b x^2\right )}{3 b}+\frac {x^2 \cosh ^2\left (a+b x^2\right ) \sinh \left (a+b x^2\right )}{6 b}\\ \end {align*}
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Mathematica [A] time = 0.19, size = 55, normalized size = 0.70 \[ -\frac {-3 b x^2 \left (9 \sinh \left (a+b x^2\right )+\sinh \left (3 \left (a+b x^2\right )\right )\right )+27 \cosh \left (a+b x^2\right )+\cosh \left (3 \left (a+b x^2\right )\right )}{72 b^2} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.76, size = 96, normalized size = 1.22 \[ \frac {3 \, b x^{2} \sinh \left (b x^{2} + a\right )^{3} - \cosh \left (b x^{2} + a\right )^{3} - 3 \, \cosh \left (b x^{2} + a\right ) \sinh \left (b x^{2} + a\right )^{2} + 9 \, {\left (b x^{2} \cosh \left (b x^{2} + a\right )^{2} + 3 \, b x^{2}\right )} \sinh \left (b x^{2} + a\right ) - 27 \, \cosh \left (b x^{2} + a\right )}{72 \, b^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [B] time = 0.14, size = 185, normalized size = 2.34 \[ \frac {3 \, {\left (b x^{2} + a\right )} e^{\left (3 \, b x^{2} + 3 \, a\right )} - 3 \, a e^{\left (3 \, b x^{2} + 3 \, a\right )} + 27 \, {\left (b x^{2} + a\right )} e^{\left (b x^{2} + a\right )} - 27 \, a e^{\left (b x^{2} + a\right )} - 27 \, {\left (b x^{2} + a\right )} e^{\left (-b x^{2} - a\right )} + 27 \, a e^{\left (-b x^{2} - a\right )} - 3 \, {\left (b x^{2} + a\right )} e^{\left (-3 \, b x^{2} - 3 \, a\right )} + 3 \, a e^{\left (-3 \, b x^{2} - 3 \, a\right )} - e^{\left (3 \, b x^{2} + 3 \, a\right )} - 27 \, e^{\left (b x^{2} + a\right )} - 27 \, e^{\left (-b x^{2} - a\right )} - e^{\left (-3 \, b x^{2} - 3 \, a\right )}}{144 \, b^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.23, size = 93, normalized size = 1.18 \[ \frac {\left (3 b \,x^{2}-1\right ) {\mathrm e}^{3 b \,x^{2}+3 a}}{144 b^{2}}+\frac {3 \left (b \,x^{2}-1\right ) {\mathrm e}^{b \,x^{2}+a}}{16 b^{2}}-\frac {3 \left (b \,x^{2}+1\right ) {\mathrm e}^{-b \,x^{2}-a}}{16 b^{2}}-\frac {\left (3 b \,x^{2}+1\right ) {\mathrm e}^{-3 b \,x^{2}-3 a}}{144 b^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.31, size = 100, normalized size = 1.27 \[ \frac {{\left (3 \, b x^{2} e^{\left (3 \, a\right )} - e^{\left (3 \, a\right )}\right )} e^{\left (3 \, b x^{2}\right )}}{144 \, b^{2}} + \frac {3 \, {\left (b x^{2} e^{a} - e^{a}\right )} e^{\left (b x^{2}\right )}}{16 \, b^{2}} - \frac {3 \, {\left (b x^{2} + 1\right )} e^{\left (-b x^{2} - a\right )}}{16 \, b^{2}} - \frac {{\left (3 \, b x^{2} + 1\right )} e^{\left (-3 \, b x^{2} - 3 \, a\right )}}{144 \, b^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.96, size = 70, normalized size = 0.89 \[ \frac {\frac {x^2\,\mathrm {sinh}\left (b\,x^2+a\right )}{3}+\frac {x^2\,{\mathrm {cosh}\left (b\,x^2+a\right )}^2\,\mathrm {sinh}\left (b\,x^2+a\right )}{6}}{b}-\frac {{\mathrm {cosh}\left (b\,x^2+a\right )}^3}{18\,b^2}-\frac {\mathrm {cosh}\left (b\,x^2+a\right )}{3\,b^2} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 2.80, size = 92, normalized size = 1.16 \[ \begin {cases} - \frac {x^{2} \sinh ^{3}{\left (a + b x^{2} \right )}}{3 b} + \frac {x^{2} \sinh {\left (a + b x^{2} \right )} \cosh ^{2}{\left (a + b x^{2} \right )}}{2 b} + \frac {\sinh ^{2}{\left (a + b x^{2} \right )} \cosh {\left (a + b x^{2} \right )}}{3 b^{2}} - \frac {7 \cosh ^{3}{\left (a + b x^{2} \right )}}{18 b^{2}} & \text {for}\: b \neq 0 \\\frac {x^{4} \cosh ^{3}{\relax (a )}}{4} & \text {otherwise} \end {cases} \]
Verification of antiderivative is not currently implemented for this CAS.
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