Integrand size = 13, antiderivative size = 392 \[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=-\frac {\sqrt {2+x^6}}{2 x}+\frac {\left (1+\sqrt {3}\right ) x \sqrt {2+x^6}}{2 \left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )}-\frac {\sqrt [4]{3} x \left (\sqrt [3]{2}+x^2\right ) \sqrt {\frac {2^{2/3}-\sqrt [3]{2} x^2+x^4}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} E\left (\arccos \left (\frac {\sqrt [3]{2}+\left (1-\sqrt {3}\right ) x^2}{\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2}\right )|\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2^{2/3} \sqrt {\frac {x^2 \left (\sqrt [3]{2}+x^2\right )}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} \sqrt {2+x^6}}-\frac {\left (1-\sqrt {3}\right ) x \left (\sqrt [3]{2}+x^2\right ) \sqrt {\frac {2^{2/3}-\sqrt [3]{2} x^2+x^4}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} \operatorname {EllipticF}\left (\arccos \left (\frac {\sqrt [3]{2}+\left (1-\sqrt {3}\right ) x^2}{\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2}\right ),\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2\ 2^{2/3} \sqrt [4]{3} \sqrt {\frac {x^2 \left (\sqrt [3]{2}+x^2\right )}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} \sqrt {2+x^6}} \]
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Time = 0.07 (sec) , antiderivative size = 392, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {331, 314, 231, 1895} \[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=-\frac {\left (1-\sqrt {3}\right ) \left (x^2+\sqrt [3]{2}\right ) \sqrt {\frac {x^4-\sqrt [3]{2} x^2+2^{2/3}}{\left (\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}\right )^2}} x \operatorname {EllipticF}\left (\arccos \left (\frac {\left (1-\sqrt {3}\right ) x^2+\sqrt [3]{2}}{\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}}\right ),\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2\ 2^{2/3} \sqrt [4]{3} \sqrt {\frac {x^2 \left (x^2+\sqrt [3]{2}\right )}{\left (\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}\right )^2}} \sqrt {x^6+2}}-\frac {\sqrt [4]{3} \left (x^2+\sqrt [3]{2}\right ) \sqrt {\frac {x^4-\sqrt [3]{2} x^2+2^{2/3}}{\left (\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}\right )^2}} x E\left (\arccos \left (\frac {\left (1-\sqrt {3}\right ) x^2+\sqrt [3]{2}}{\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}}\right )|\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2^{2/3} \sqrt {\frac {x^2 \left (x^2+\sqrt [3]{2}\right )}{\left (\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}\right )^2}} \sqrt {x^6+2}}-\frac {\sqrt {x^6+2}}{2 x}+\frac {\left (1+\sqrt {3}\right ) \sqrt {x^6+2} x}{2 \left (\left (1+\sqrt {3}\right ) x^2+\sqrt [3]{2}\right )} \]
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Rule 231
Rule 314
Rule 331
Rule 1895
Rubi steps \begin{align*} \text {integral}& = -\frac {\sqrt {2+x^6}}{2 x}+\int \frac {x^4}{\sqrt {2+x^6}} \, dx \\ & = -\frac {\sqrt {2+x^6}}{2 x}-\frac {1}{2} \int \frac {2^{2/3} \left (-1+\sqrt {3}\right )-2 x^4}{\sqrt {2+x^6}} \, dx-\frac {\left (1-\sqrt {3}\right ) \int \frac {1}{\sqrt {2+x^6}} \, dx}{\sqrt [3]{2}} \\ & = -\frac {\sqrt {2+x^6}}{2 x}+\frac {\left (1+\sqrt {3}\right ) x \sqrt {2+x^6}}{2 \left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )}-\frac {\sqrt [4]{3} x \left (\sqrt [3]{2}+x^2\right ) \sqrt {\frac {2^{2/3}-\sqrt [3]{2} x^2+x^4}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} E\left (\cos ^{-1}\left (\frac {\sqrt [3]{2}+\left (1-\sqrt {3}\right ) x^2}{\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2}\right )|\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2^{2/3} \sqrt {\frac {x^2 \left (\sqrt [3]{2}+x^2\right )}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} \sqrt {2+x^6}}-\frac {\left (1-\sqrt {3}\right ) x \left (\sqrt [3]{2}+x^2\right ) \sqrt {\frac {2^{2/3}-\sqrt [3]{2} x^2+x^4}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} F\left (\cos ^{-1}\left (\frac {\sqrt [3]{2}+\left (1-\sqrt {3}\right ) x^2}{\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2}\right )|\frac {1}{4} \left (2+\sqrt {3}\right )\right )}{2\ 2^{2/3} \sqrt [4]{3} \sqrt {\frac {x^2 \left (\sqrt [3]{2}+x^2\right )}{\left (\sqrt [3]{2}+\left (1+\sqrt {3}\right ) x^2\right )^2}} \sqrt {2+x^6}} \\ \end{align*}
Result contains higher order function than in optimal. Order 5 vs. order 4 in optimal.
Time = 10.01 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.07 \[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=-\frac {\operatorname {Hypergeometric2F1}\left (-\frac {1}{6},\frac {1}{2},\frac {5}{6},-\frac {x^6}{2}\right )}{\sqrt {2} x} \]
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Result contains higher order function than in optimal. Order 5 vs. order 4.
Time = 5.13 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.05
method | result | size |
meijerg | \(-\frac {\sqrt {2}\, {}_{2}^{}{\moversetsp {}{\mundersetsp {}{F_{1}^{}}}}\left (-\frac {1}{6},\frac {1}{2};\frac {5}{6};-\frac {x^{6}}{2}\right )}{2 x}\) | \(20\) |
risch | \(-\frac {\sqrt {x^{6}+2}}{2 x}+\frac {\sqrt {2}\, x^{5} {}_{2}^{}{\moversetsp {}{\mundersetsp {}{F_{1}^{}}}}\left (\frac {1}{2},\frac {5}{6};\frac {11}{6};-\frac {x^{6}}{2}\right )}{10}\) | \(33\) |
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\[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=\int { \frac {1}{\sqrt {x^{6} + 2} x^{2}} \,d x } \]
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Result contains complex when optimal does not.
Time = 0.41 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.09 \[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=\frac {\sqrt {2} \Gamma \left (- \frac {1}{6}\right ) {{}_{2}F_{1}\left (\begin {matrix} - \frac {1}{6}, \frac {1}{2} \\ \frac {5}{6} \end {matrix}\middle | {\frac {x^{6} e^{i \pi }}{2}} \right )}}{12 x \Gamma \left (\frac {5}{6}\right )} \]
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\[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=\int { \frac {1}{\sqrt {x^{6} + 2} x^{2}} \,d x } \]
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\[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=\int { \frac {1}{\sqrt {x^{6} + 2} x^{2}} \,d x } \]
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Time = 5.89 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.08 \[ \int \frac {1}{x^2 \sqrt {2+x^6}} \, dx=-\frac {\sqrt {\frac {2}{x^6}+1}\,{{}}_2{\mathrm {F}}_1\left (\frac {1}{2},\frac {2}{3};\ \frac {5}{3};\ -\frac {2}{x^6}\right )}{4\,x\,\sqrt {x^6+2}} \]
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