Optimal. Leaf size=31 \[ \frac{1}{4} \tanh ^{-1}\left (\sqrt{x^4+1}\right )-\frac{\sqrt{x^4+1}}{4 x^4} \]
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Rubi [A] time = 0.0108621, antiderivative size = 31, 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 = {266, 51, 63, 207} \[ \frac{1}{4} \tanh ^{-1}\left (\sqrt{x^4+1}\right )-\frac{\sqrt{x^4+1}}{4 x^4} \]
Antiderivative was successfully verified.
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Rule 266
Rule 51
Rule 63
Rule 207
Rubi steps
\begin{align*} \int \frac{1}{x^5 \sqrt{1+x^4}} \, dx &=\frac{1}{4} \operatorname{Subst}\left (\int \frac{1}{x^2 \sqrt{1+x}} \, dx,x,x^4\right )\\ &=-\frac{\sqrt{1+x^4}}{4 x^4}-\frac{1}{8} \operatorname{Subst}\left (\int \frac{1}{x \sqrt{1+x}} \, dx,x,x^4\right )\\ &=-\frac{\sqrt{1+x^4}}{4 x^4}-\frac{1}{4} \operatorname{Subst}\left (\int \frac{1}{-1+x^2} \, dx,x,\sqrt{1+x^4}\right )\\ &=-\frac{\sqrt{1+x^4}}{4 x^4}+\frac{1}{4} \tanh ^{-1}\left (\sqrt{1+x^4}\right )\\ \end{align*}
Mathematica [A] time = 0.007464, size = 31, normalized size = 1. \[ \frac{1}{4} \tanh ^{-1}\left (\sqrt{x^4+1}\right )-\frac{\sqrt{x^4+1}}{4 x^4} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.045, size = 24, normalized size = 0.8 \begin{align*} -{\frac{1}{4\,{x}^{4}}\sqrt{{x}^{4}+1}}+{\frac{1}{4}{\it Artanh} \left ({\frac{1}{\sqrt{{x}^{4}+1}}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 0.983707, size = 50, normalized size = 1.61 \begin{align*} -\frac{\sqrt{x^{4} + 1}}{4 \, x^{4}} + \frac{1}{8} \, \log \left (\sqrt{x^{4} + 1} + 1\right ) - \frac{1}{8} \, \log \left (\sqrt{x^{4} + 1} - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.49822, size = 115, normalized size = 3.71 \begin{align*} \frac{x^{4} \log \left (\sqrt{x^{4} + 1} + 1\right ) - x^{4} \log \left (\sqrt{x^{4} + 1} - 1\right ) - 2 \, \sqrt{x^{4} + 1}}{8 \, x^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 2.42289, size = 22, normalized size = 0.71 \begin{align*} \frac{\operatorname{asinh}{\left (\frac{1}{x^{2}} \right )}}{4} - \frac{\sqrt{1 + \frac{1}{x^{4}}}}{4 x^{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.16324, size = 50, normalized size = 1.61 \begin{align*} -\frac{\sqrt{x^{4} + 1}}{4 \, x^{4}} + \frac{1}{8} \, \log \left (\sqrt{x^{4} + 1} + 1\right ) - \frac{1}{8} \, \log \left (\sqrt{x^{4} + 1} - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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