Integrand size = 11, antiderivative size = 35 \[ \int x \sqrt {x+x^6} \, dx=\frac {1}{5} x^2 \sqrt {x+x^6}+\frac {1}{5} \text {arctanh}\left (\frac {x^3}{\sqrt {x+x^6}}\right ) \]
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Time = 0.02 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {2046, 2054, 212} \[ \int x \sqrt {x+x^6} \, dx=\frac {1}{5} \text {arctanh}\left (\frac {x^3}{\sqrt {x^6+x}}\right )+\frac {1}{5} \sqrt {x^6+x} x^2 \]
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Rule 212
Rule 2046
Rule 2054
Rubi steps \begin{align*} \text {integral}& = \frac {1}{5} x^2 \sqrt {x+x^6}+\frac {1}{2} \int \frac {x^2}{\sqrt {x+x^6}} \, dx \\ & = \frac {1}{5} x^2 \sqrt {x+x^6}+\frac {1}{5} \text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {x^3}{\sqrt {x+x^6}}\right ) \\ & = \frac {1}{5} x^2 \sqrt {x+x^6}+\frac {1}{5} \text {arctanh}\left (\frac {x^3}{\sqrt {x+x^6}}\right ) \\ \end{align*}
Time = 0.14 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.71 \[ \int x \sqrt {x+x^6} \, dx=\frac {1}{5} x^2 \sqrt {x+x^6}+\frac {\sqrt {x+x^6} \log \left (x^{5/2}+\sqrt {1+x^5}\right )}{5 \sqrt {x} \sqrt {1+x^5}} \]
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Time = 1.24 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.77
method | result | size |
risch | \(\frac {x^{3} \left (x^{5}+1\right )}{5 \sqrt {x \left (x^{5}+1\right )}}+\frac {\operatorname {arcsinh}\left (x^{\frac {5}{2}}\right )}{5}\) | \(27\) |
meijerg | \(-\frac {-2 \sqrt {\pi }\, x^{\frac {5}{2}} \sqrt {x^{5}+1}-2 \sqrt {\pi }\, \operatorname {arcsinh}\left (x^{\frac {5}{2}}\right )}{10 \sqrt {\pi }}\) | \(31\) |
trager | \(\frac {x^{2} \sqrt {x^{6}+x}}{5}+\frac {\ln \left (2 x^{5}+2 x^{2} \sqrt {x^{6}+x}+1\right )}{10}\) | \(36\) |
pseudoelliptic | \(\frac {x^{2} \sqrt {x^{6}+x}}{5}-\frac {\ln \left (\frac {-x^{3}+\sqrt {x^{6}+x}}{x^{3}}\right )}{10}+\frac {\ln \left (\frac {x^{3}+\sqrt {x^{6}+x}}{x^{3}}\right )}{10}\) | \(52\) |
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Time = 0.29 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00 \[ \int x \sqrt {x+x^6} \, dx=\frac {1}{5} \, \sqrt {x^{6} + x} x^{2} + \frac {1}{10} \, \log \left (2 \, x^{5} + 2 \, \sqrt {x^{6} + x} x^{2} + 1\right ) \]
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\[ \int x \sqrt {x+x^6} \, dx=\int x \sqrt {x \left (x + 1\right ) \left (x^{4} - x^{3} + x^{2} - x + 1\right )}\, dx \]
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\[ \int x \sqrt {x+x^6} \, dx=\int { \sqrt {x^{6} + x} x \,d x } \]
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Time = 0.31 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.23 \[ \int x \sqrt {x+x^6} \, dx=\frac {1}{5} \, \sqrt {x^{6} + x} x^{2} + \frac {\log \left (\sqrt {\frac {1}{x^{5}} + 1} + 1\right ) - \log \left ({\left | \sqrt {\frac {1}{x^{5}} + 1} - 1 \right |}\right )}{10 \, \mathrm {sgn}\left (x\right )} \]
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Timed out. \[ \int x \sqrt {x+x^6} \, dx=\int x\,\sqrt {x^6+x} \,d x \]
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