Optimal. Leaf size=107 \[ -\frac{4 b^{5/2} x^3 \left (\frac{a}{b x^4}+1\right )^{3/4} \text{EllipticF}\left (\frac{1}{2} \cot ^{-1}\left (\frac{\sqrt{b} x^2}{\sqrt{a}}\right ),2\right )}{7 a^{5/2} \left (a+b x^4\right )^{3/4}}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}-\frac{\sqrt [4]{a+b x^4}}{7 a x^7} \]
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Rubi [A] time = 0.0453221, antiderivative size = 107, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 5, integrand size = 15, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.333, Rules used = {325, 237, 335, 275, 231} \[ -\frac{4 b^{5/2} x^3 \left (\frac{a}{b x^4}+1\right )^{3/4} F\left (\left .\frac{1}{2} \cot ^{-1}\left (\frac{\sqrt{b} x^2}{\sqrt{a}}\right )\right |2\right )}{7 a^{5/2} \left (a+b x^4\right )^{3/4}}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}-\frac{\sqrt [4]{a+b x^4}}{7 a x^7} \]
Antiderivative was successfully verified.
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Rule 325
Rule 237
Rule 335
Rule 275
Rule 231
Rubi steps
\begin{align*} \int \frac{1}{x^8 \left (a+b x^4\right )^{3/4}} \, dx &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}-\frac{(6 b) \int \frac{1}{x^4 \left (a+b x^4\right )^{3/4}} \, dx}{7 a}\\ &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}+\frac{\left (4 b^2\right ) \int \frac{1}{\left (a+b x^4\right )^{3/4}} \, dx}{7 a^2}\\ &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}+\frac{\left (4 b^2 \left (1+\frac{a}{b x^4}\right )^{3/4} x^3\right ) \int \frac{1}{\left (1+\frac{a}{b x^4}\right )^{3/4} x^3} \, dx}{7 a^2 \left (a+b x^4\right )^{3/4}}\\ &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}-\frac{\left (4 b^2 \left (1+\frac{a}{b x^4}\right )^{3/4} x^3\right ) \operatorname{Subst}\left (\int \frac{x}{\left (1+\frac{a x^4}{b}\right )^{3/4}} \, dx,x,\frac{1}{x}\right )}{7 a^2 \left (a+b x^4\right )^{3/4}}\\ &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}-\frac{\left (2 b^2 \left (1+\frac{a}{b x^4}\right )^{3/4} x^3\right ) \operatorname{Subst}\left (\int \frac{1}{\left (1+\frac{a x^2}{b}\right )^{3/4}} \, dx,x,\frac{1}{x^2}\right )}{7 a^2 \left (a+b x^4\right )^{3/4}}\\ &=-\frac{\sqrt [4]{a+b x^4}}{7 a x^7}+\frac{2 b \sqrt [4]{a+b x^4}}{7 a^2 x^3}-\frac{4 b^{5/2} \left (1+\frac{a}{b x^4}\right )^{3/4} x^3 F\left (\left .\frac{1}{2} \cot ^{-1}\left (\frac{\sqrt{b} x^2}{\sqrt{a}}\right )\right |2\right )}{7 a^{5/2} \left (a+b x^4\right )^{3/4}}\\ \end{align*}
Mathematica [C] time = 0.0091989, size = 51, normalized size = 0.48 \[ -\frac{\left (\frac{b x^4}{a}+1\right )^{3/4} \, _2F_1\left (-\frac{7}{4},\frac{3}{4};-\frac{3}{4};-\frac{b x^4}{a}\right )}{7 x^7 \left (a+b x^4\right )^{3/4}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.031, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{{x}^{8}} \left ( b{x}^{4}+a \right ) ^{-{\frac{3}{4}}}}\, dx \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{1}{{\left (b x^{4} + a\right )}^{\frac{3}{4}} x^{8}}\,{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{{\left (b x^{4} + a\right )}^{\frac{1}{4}}}{b x^{12} + a x^{8}}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 1.77256, size = 44, normalized size = 0.41 \begin{align*} \frac{\Gamma \left (- \frac{7}{4}\right ){{}_{2}F_{1}\left (\begin{matrix} - \frac{7}{4}, \frac{3}{4} \\ - \frac{3}{4} \end{matrix}\middle |{\frac{b x^{4} e^{i \pi }}{a}} \right )}}{4 a^{\frac{3}{4}} x^{7} \Gamma \left (- \frac{3}{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{1}{{\left (b x^{4} + a\right )}^{\frac{3}{4}} x^{8}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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