Optimal. Leaf size=124 \[ -\frac{3 \left (x^2+1\right ) \sqrt{\frac{x^4+1}{\left (x^2+1\right )^2}} \text{EllipticF}\left (2 \tan ^{-1}(x),\frac{1}{2}\right )}{10 \sqrt{x^4+1}}+\frac{1}{5} \sqrt{x^4+1} x^3-\frac{3 \sqrt{x^4+1} x}{5 \left (x^2+1\right )}+\frac{3 \left (x^2+1\right ) \sqrt{\frac{x^4+1}{\left (x^2+1\right )^2}} E\left (2 \tan ^{-1}(x)|\frac{1}{2}\right )}{5 \sqrt{x^4+1}} \]
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Rubi [A] time = 0.0219355, antiderivative size = 124, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.308, Rules used = {321, 305, 220, 1196} \[ \frac{1}{5} \sqrt{x^4+1} x^3-\frac{3 \sqrt{x^4+1} x}{5 \left (x^2+1\right )}-\frac{3 \left (x^2+1\right ) \sqrt{\frac{x^4+1}{\left (x^2+1\right )^2}} F\left (2 \tan ^{-1}(x)|\frac{1}{2}\right )}{10 \sqrt{x^4+1}}+\frac{3 \left (x^2+1\right ) \sqrt{\frac{x^4+1}{\left (x^2+1\right )^2}} E\left (2 \tan ^{-1}(x)|\frac{1}{2}\right )}{5 \sqrt{x^4+1}} \]
Antiderivative was successfully verified.
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Rule 321
Rule 305
Rule 220
Rule 1196
Rubi steps
\begin{align*} \int \frac{x^6}{\sqrt{1+x^4}} \, dx &=\frac{1}{5} x^3 \sqrt{1+x^4}-\frac{3}{5} \int \frac{x^2}{\sqrt{1+x^4}} \, dx\\ &=\frac{1}{5} x^3 \sqrt{1+x^4}-\frac{3}{5} \int \frac{1}{\sqrt{1+x^4}} \, dx+\frac{3}{5} \int \frac{1-x^2}{\sqrt{1+x^4}} \, dx\\ &=\frac{1}{5} x^3 \sqrt{1+x^4}-\frac{3 x \sqrt{1+x^4}}{5 \left (1+x^2\right )}+\frac{3 \left (1+x^2\right ) \sqrt{\frac{1+x^4}{\left (1+x^2\right )^2}} E\left (2 \tan ^{-1}(x)|\frac{1}{2}\right )}{5 \sqrt{1+x^4}}-\frac{3 \left (1+x^2\right ) \sqrt{\frac{1+x^4}{\left (1+x^2\right )^2}} F\left (2 \tan ^{-1}(x)|\frac{1}{2}\right )}{10 \sqrt{1+x^4}}\\ \end{align*}
Mathematica [C] time = 0.0067458, size = 34, normalized size = 0.27 \[ \frac{1}{5} x^3 \left (\sqrt{x^4+1}-\, _2F_1\left (\frac{1}{2},\frac{3}{4};\frac{7}{4};-x^4\right )\right ) \]
Antiderivative was successfully verified.
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Maple [C] time = 0.006, size = 95, normalized size = 0.8 \begin{align*}{\frac{{x}^{3}}{5}\sqrt{{x}^{4}+1}}-{\frac{{\frac{3\,i}{5}} \left ({\it EllipticF} \left ( x \left ({\frac{\sqrt{2}}{2}}+{\frac{i}{2}}\sqrt{2} \right ) ,i \right ) -{\it EllipticE} \left ( x \left ({\frac{\sqrt{2}}{2}}+{\frac{i}{2}}\sqrt{2} \right ) ,i \right ) \right ) }{{\frac{\sqrt{2}}{2}}+{\frac{i}{2}}\sqrt{2}}\sqrt{1-i{x}^{2}}\sqrt{1+i{x}^{2}}{\frac{1}{\sqrt{{x}^{4}+1}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{6}}{\sqrt{x^{4} + 1}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (\frac{x^{6}}{\sqrt{x^{4} + 1}}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 0.878293, size = 29, normalized size = 0.23 \begin{align*} \frac{x^{7} \Gamma \left (\frac{7}{4}\right ){{}_{2}F_{1}\left (\begin{matrix} \frac{1}{2}, \frac{7}{4} \\ \frac{11}{4} \end{matrix}\middle |{x^{4} e^{i \pi }} \right )}}{4 \Gamma \left (\frac{11}{4}\right )} \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^{6}}{\sqrt{x^{4} + 1}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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