Optimal. Leaf size=66 \[ \frac {\text {RootSum}\left [\text {$\#$1}^8-2 \text {$\#$1}^4 a+2 a^2\& ,\frac {\log \left (\sqrt [4]{a x^4+b}-\text {$\#$1} x\right )-\log (x)}{\text {$\#$1}^3 a-\text {$\#$1}^7}\& \right ]}{8 b} \]
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Rubi [B] time = 0.72, antiderivative size = 325, normalized size of antiderivative = 4.92, number of steps used = 10, number of rules used = 4, integrand size = 28, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {1529, 494, 298, 205} \begin {gather*} \frac {\left (-a^2\right )^{7/8} \tan ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{\sqrt {-a^2}-a} x}{\sqrt [8]{-a^2} \sqrt [4]{a x^4+b}}\right )}{4 a^{11/4} \left (\sqrt {-a^2}-a\right )^{3/4} b}-\frac {\left (-a^2\right )^{3/8} \tan ^{-1}\left (\frac {\left (-a^2\right )^{3/8} \sqrt [4]{\sqrt {-a^2}-a} x}{a^{3/4} \sqrt [4]{a x^4+b}}\right )}{4 a^{7/4} \left (\sqrt {-a^2}-a\right )^{3/4} b}+\frac {\tan ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{\sqrt {-a^2}+a} x}{\sqrt [8]{-a^2} \sqrt [4]{a x^4+b}}\right )}{4 a^{3/4} \sqrt [8]{-a^2} \left (\sqrt {-a^2}+a\right )^{3/4} b}-\frac {\sqrt [4]{a} \tan ^{-1}\left (\frac {\left (-a^2\right )^{3/8} \sqrt [4]{\sqrt {-a^2}+a} x}{a^{3/4} \sqrt [4]{a x^4+b}}\right )}{4 \left (-a^2\right )^{5/8} \left (\sqrt {-a^2}+a\right )^{3/4} b} \end {gather*}
Antiderivative was successfully verified.
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Rule 205
Rule 298
Rule 494
Rule 1529
Rubi steps
\begin {align*} \int \frac {x^6}{\left (b+a x^4\right )^{3/4} \left (b^2+a^2 x^8\right )} \, dx &=\int \left (\frac {x^2}{2 \left (b+a x^4\right )^{3/4} \left (-\sqrt {-a^2} b+a^2 x^4\right )}+\frac {x^2}{2 \left (b+a x^4\right )^{3/4} \left (\sqrt {-a^2} b+a^2 x^4\right )}\right ) \, dx\\ &=\frac {1}{2} \int \frac {x^2}{\left (b+a x^4\right )^{3/4} \left (-\sqrt {-a^2} b+a^2 x^4\right )} \, dx+\frac {1}{2} \int \frac {x^2}{\left (b+a x^4\right )^{3/4} \left (\sqrt {-a^2} b+a^2 x^4\right )} \, dx\\ &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {x^2}{-\sqrt {-a^2} b-\left (-a^2 b-a \sqrt {-a^2} b\right ) x^4} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )+\frac {1}{2} \operatorname {Subst}\left (\int \frac {x^2}{\sqrt {-a^2} b-\left (-a^2 b+a \sqrt {-a^2} b\right ) x^4} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )\\ &=\frac {\operatorname {Subst}\left (\int \frac {1}{\sqrt [4]{-a^2}-\sqrt {a} \sqrt {-a+\sqrt {-a^2}} x^2} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )}{4 \sqrt {a} \sqrt {-a+\sqrt {-a^2}} b}-\frac {\operatorname {Subst}\left (\int \frac {1}{\sqrt [4]{-a^2}+\sqrt {a} \sqrt {-a+\sqrt {-a^2}} x^2} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )}{4 \sqrt {a} \sqrt {-a+\sqrt {-a^2}} b}-\frac {\operatorname {Subst}\left (\int \frac {1}{\sqrt [4]{-a^2}-\sqrt {a} \sqrt {a+\sqrt {-a^2}} x^2} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )}{4 \sqrt {a} \sqrt {a+\sqrt {-a^2}} b}+\frac {\operatorname {Subst}\left (\int \frac {1}{\sqrt [4]{-a^2}+\sqrt {a} \sqrt {a+\sqrt {-a^2}} x^2} \, dx,x,\frac {x}{\sqrt [4]{b+a x^4}}\right )}{4 \sqrt {a} \sqrt {a+\sqrt {-a^2}} b}\\ &=-\frac {\tan ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{-a+\sqrt {-a^2}} x}{\sqrt [8]{-a^2} \sqrt [4]{b+a x^4}}\right )}{4 a^{3/4} \sqrt [8]{-a^2} \left (-a+\sqrt {-a^2}\right )^{3/4} b}+\frac {\sqrt [4]{a} \tan ^{-1}\left (\frac {\left (-a^2\right )^{3/8} \sqrt [4]{-a+\sqrt {-a^2}} x}{a^{3/4} \sqrt [4]{b+a x^4}}\right )}{4 \left (-a^2\right )^{5/8} \left (-a+\sqrt {-a^2}\right )^{3/4} b}+\frac {\tan ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{a+\sqrt {-a^2}} x}{\sqrt [8]{-a^2} \sqrt [4]{b+a x^4}}\right )}{4 a^{3/4} \sqrt [8]{-a^2} \left (a+\sqrt {-a^2}\right )^{3/4} b}-\frac {\sqrt [4]{a} \tan ^{-1}\left (\frac {\left (-a^2\right )^{3/8} \sqrt [4]{a+\sqrt {-a^2}} x}{a^{3/4} \sqrt [4]{b+a x^4}}\right )}{4 \left (-a^2\right )^{5/8} \left (a+\sqrt {-a^2}\right )^{3/4} b}\\ \end {align*}
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Mathematica [F] time = 0.13, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x^6}{\left (b+a x^4\right )^{3/4} \left (b^2+a^2 x^8\right )} \, dx \end {gather*}
Verification is not applicable to the result.
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IntegrateAlgebraic [A] time = 0.64, size = 65, normalized size = 0.98 \begin {gather*} \frac {\text {RootSum}\left [2 a^2-2 a \text {$\#$1}^4+\text {$\#$1}^8\&,\frac {\log (x)-\log \left (\sqrt [4]{b+a x^4}-x \text {$\#$1}\right )}{-a \text {$\#$1}^3+\text {$\#$1}^7}\&\right ]}{8 b} \end {gather*}
Antiderivative was successfully verified.
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fricas [F(-1)] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Timed out} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x^{6}}{{\left (a^{2} x^{8} + b^{2}\right )} {\left (a x^{4} + b\right )}^{\frac {3}{4}}}\,{d x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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maple [F] time = 0.03, size = 0, normalized size = 0.00 \[\int \frac {x^{6}}{\left (a \,x^{4}+b \right )^{\frac {3}{4}} \left (a^{2} x^{8}+b^{2}\right )}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x^{6}}{{\left (a^{2} x^{8} + b^{2}\right )} {\left (a x^{4} + b\right )}^{\frac {3}{4}}}\,{d x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.02 \begin {gather*} \int \frac {x^6}{\left (a^2\,x^8+b^2\right )\,{\left (a\,x^4+b\right )}^{3/4}} \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x^{6}}{\left (a x^{4} + b\right )^{\frac {3}{4}} \left (a^{2} x^{8} + b^{2}\right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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