Optimal. Leaf size=97 \[ \frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{5 a \tan ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}-\frac{5 a \tanh ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}-\frac{x^5}{b \sqrt [4]{a+b x^4}} \]
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Rubi [A] time = 0.0311875, antiderivative size = 97, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 6, integrand size = 15, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.4, Rules used = {288, 321, 240, 212, 206, 203} \[ \frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{5 a \tan ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}-\frac{5 a \tanh ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}-\frac{x^5}{b \sqrt [4]{a+b x^4}} \]
Antiderivative was successfully verified.
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Rule 288
Rule 321
Rule 240
Rule 212
Rule 206
Rule 203
Rubi steps
\begin{align*} \int \frac{x^8}{\left (a+b x^4\right )^{5/4}} \, dx &=-\frac{x^5}{b \sqrt [4]{a+b x^4}}+\frac{5 \int \frac{x^4}{\sqrt [4]{a+b x^4}} \, dx}{b}\\ &=-\frac{x^5}{b \sqrt [4]{a+b x^4}}+\frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{(5 a) \int \frac{1}{\sqrt [4]{a+b x^4}} \, dx}{4 b^2}\\ &=-\frac{x^5}{b \sqrt [4]{a+b x^4}}+\frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{(5 a) \operatorname{Subst}\left (\int \frac{1}{1-b x^4} \, dx,x,\frac{x}{\sqrt [4]{a+b x^4}}\right )}{4 b^2}\\ &=-\frac{x^5}{b \sqrt [4]{a+b x^4}}+\frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{(5 a) \operatorname{Subst}\left (\int \frac{1}{1-\sqrt{b} x^2} \, dx,x,\frac{x}{\sqrt [4]{a+b x^4}}\right )}{8 b^2}-\frac{(5 a) \operatorname{Subst}\left (\int \frac{1}{1+\sqrt{b} x^2} \, dx,x,\frac{x}{\sqrt [4]{a+b x^4}}\right )}{8 b^2}\\ &=-\frac{x^5}{b \sqrt [4]{a+b x^4}}+\frac{5 x \left (a+b x^4\right )^{3/4}}{4 b^2}-\frac{5 a \tan ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}-\frac{5 a \tanh ^{-1}\left (\frac{\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{8 b^{9/4}}\\ \end{align*}
Mathematica [C] time = 0.0139504, size = 60, normalized size = 0.62 \[ \frac{x^5-x^5 \sqrt [4]{\frac{b x^4}{a}+1} \, _2F_1\left (\frac{5}{4},\frac{5}{4};\frac{9}{4};-\frac{b x^4}{a}\right )}{4 b \sqrt [4]{a+b x^4}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.044, size = 0, normalized size = 0. \begin{align*} \int{{x}^{8} \left ( b{x}^{4}+a \right ) ^{-{\frac{5}{4}}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 1.65184, size = 597, normalized size = 6.15 \begin{align*} -\frac{20 \,{\left (b^{3} x^{4} + a b^{2}\right )} \left (\frac{a^{4}}{b^{9}}\right )^{\frac{1}{4}} \arctan \left (-\frac{{\left (b x^{4} + a\right )}^{\frac{1}{4}} a^{3} b^{2} \left (\frac{a^{4}}{b^{9}}\right )^{\frac{1}{4}} - b^{2} x \sqrt{\frac{a^{4} b^{5} x^{2} \sqrt{\frac{a^{4}}{b^{9}}} + \sqrt{b x^{4} + a} a^{6}}{x^{2}}} \left (\frac{a^{4}}{b^{9}}\right )^{\frac{1}{4}}}{a^{4} x}\right ) + 5 \,{\left (b^{3} x^{4} + a b^{2}\right )} \left (\frac{a^{4}}{b^{9}}\right )^{\frac{1}{4}} \log \left (\frac{125 \,{\left (b^{7} x \left (\frac{a^{4}}{b^{9}}\right )^{\frac{3}{4}} +{\left (b x^{4} + a\right )}^{\frac{1}{4}} a^{3}\right )}}{x}\right ) - 5 \,{\left (b^{3} x^{4} + a b^{2}\right )} \left (\frac{a^{4}}{b^{9}}\right )^{\frac{1}{4}} \log \left (-\frac{125 \,{\left (b^{7} x \left (\frac{a^{4}}{b^{9}}\right )^{\frac{3}{4}} -{\left (b x^{4} + a\right )}^{\frac{1}{4}} a^{3}\right )}}{x}\right ) - 4 \,{\left (b x^{5} + 5 \, a x\right )}{\left (b x^{4} + a\right )}^{\frac{3}{4}}}{16 \,{\left (b^{3} x^{4} + a b^{2}\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 2.0083, size = 37, normalized size = 0.38 \begin{align*} \frac{x^{9} \Gamma \left (\frac{9}{4}\right ){{}_{2}F_{1}\left (\begin{matrix} \frac{5}{4}, \frac{9}{4} \\ \frac{13}{4} \end{matrix}\middle |{\frac{b x^{4} e^{i \pi }}{a}} \right )}}{4 a^{\frac{5}{4}} \Gamma \left (\frac{13}{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^{8}}{{\left (b x^{4} + a\right )}^{\frac{5}{4}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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