Optimal. Leaf size=31 \[ \frac{1}{3} \sinh ^{-1}\left (\frac{x^3}{\sqrt{2}}\right )-\frac{x^3}{3 \sqrt{x^6+2}} \]
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Rubi [A] time = 0.012157, antiderivative size = 31, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.231, Rules used = {275, 288, 215} \[ \frac{1}{3} \sinh ^{-1}\left (\frac{x^3}{\sqrt{2}}\right )-\frac{x^3}{3 \sqrt{x^6+2}} \]
Antiderivative was successfully verified.
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Rule 275
Rule 288
Rule 215
Rubi steps
\begin{align*} \int \frac{x^8}{\left (2+x^6\right )^{3/2}} \, dx &=\frac{1}{3} \operatorname{Subst}\left (\int \frac{x^2}{\left (2+x^2\right )^{3/2}} \, dx,x,x^3\right )\\ &=-\frac{x^3}{3 \sqrt{2+x^6}}+\frac{1}{3} \operatorname{Subst}\left (\int \frac{1}{\sqrt{2+x^2}} \, dx,x,x^3\right )\\ &=-\frac{x^3}{3 \sqrt{2+x^6}}+\frac{1}{3} \sinh ^{-1}\left (\frac{x^3}{\sqrt{2}}\right )\\ \end{align*}
Mathematica [A] time = 0.0148155, size = 29, normalized size = 0.94 \[ \frac{1}{3} \left (\sinh ^{-1}\left (\frac{x^3}{\sqrt{2}}\right )-\frac{x^3}{\sqrt{x^6+2}}\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.012, size = 25, normalized size = 0.8 \begin{align*}{\frac{1}{3}{\it Arcsinh} \left ({\frac{{x}^{3}\sqrt{2}}{2}} \right ) }-{\frac{{x}^{3}}{3}{\frac{1}{\sqrt{{x}^{6}+2}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 0.991835, size = 61, normalized size = 1.97 \begin{align*} -\frac{x^{3}}{3 \, \sqrt{x^{6} + 2}} + \frac{1}{6} \, \log \left (\frac{\sqrt{x^{6} + 2}}{x^{3}} + 1\right ) - \frac{1}{6} \, \log \left (\frac{\sqrt{x^{6} + 2}}{x^{3}} - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.45144, size = 113, normalized size = 3.65 \begin{align*} -\frac{x^{6} + \sqrt{x^{6} + 2} x^{3} +{\left (x^{6} + 2\right )} \log \left (-x^{3} + \sqrt{x^{6} + 2}\right ) + 2}{3 \,{\left (x^{6} + 2\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 1.57409, size = 26, normalized size = 0.84 \begin{align*} - \frac{x^{3}}{3 \sqrt{x^{6} + 2}} + \frac{\operatorname{asinh}{\left (\frac{\sqrt{2} x^{3}}{2} \right )}}{3} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{8}}{{\left (x^{6} + 2\right )}^{\frac{3}{2}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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