Integrand size = 18, antiderivative size = 71 \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=-\frac {\sqrt {4+2 x^2+x^4}}{16 x^4}+\frac {3 \sqrt {4+2 x^2+x^4}}{64 x^2}+\frac {1}{128} \text {arctanh}\left (\frac {4+x^2}{2 \sqrt {4+2 x^2+x^4}}\right ) \]
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Time = 0.05 (sec) , antiderivative size = 71, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.278, Rules used = {1128, 758, 820, 738, 212} \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\frac {1}{128} \text {arctanh}\left (\frac {x^2+4}{2 \sqrt {x^4+2 x^2+4}}\right )+\frac {3 \sqrt {x^4+2 x^2+4}}{64 x^2}-\frac {\sqrt {x^4+2 x^2+4}}{16 x^4} \]
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Rule 212
Rule 738
Rule 758
Rule 820
Rule 1128
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {1}{x^3 \sqrt {4+2 x+x^2}} \, dx,x,x^2\right ) \\ & = -\frac {\sqrt {4+2 x^2+x^4}}{16 x^4}-\frac {1}{16} \text {Subst}\left (\int \frac {3+x}{x^2 \sqrt {4+2 x+x^2}} \, dx,x,x^2\right ) \\ & = -\frac {\sqrt {4+2 x^2+x^4}}{16 x^4}+\frac {3 \sqrt {4+2 x^2+x^4}}{64 x^2}-\frac {1}{64} \text {Subst}\left (\int \frac {1}{x \sqrt {4+2 x+x^2}} \, dx,x,x^2\right ) \\ & = -\frac {\sqrt {4+2 x^2+x^4}}{16 x^4}+\frac {3 \sqrt {4+2 x^2+x^4}}{64 x^2}+\frac {1}{32} \text {Subst}\left (\int \frac {1}{16-x^2} \, dx,x,\frac {2 \left (4+x^2\right )}{\sqrt {4+2 x^2+x^4}}\right ) \\ & = -\frac {\sqrt {4+2 x^2+x^4}}{16 x^4}+\frac {3 \sqrt {4+2 x^2+x^4}}{64 x^2}+\frac {1}{128} \text {arctanh}\left (\frac {4+x^2}{2 \sqrt {4+2 x^2+x^4}}\right ) \\ \end{align*}
Time = 0.14 (sec) , antiderivative size = 57, normalized size of antiderivative = 0.80 \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\frac {1}{64} \left (\frac {\left (-4+3 x^2\right ) \sqrt {4+2 x^2+x^4}}{x^4}-\text {arctanh}\left (\frac {1}{2} \left (x^2-\sqrt {4+2 x^2+x^4}\right )\right )\right ) \]
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Time = 0.22 (sec) , antiderivative size = 52, normalized size of antiderivative = 0.73
method | result | size |
trager | \(\frac {\left (3 x^{2}-4\right ) \sqrt {x^{4}+2 x^{2}+4}}{64 x^{4}}+\frac {\ln \left (\frac {x^{2}+2 \sqrt {x^{4}+2 x^{2}+4}+4}{x^{2}}\right )}{128}\) | \(52\) |
default | \(-\frac {\sqrt {x^{4}+2 x^{2}+4}}{16 x^{4}}+\frac {3 \sqrt {x^{4}+2 x^{2}+4}}{64 x^{2}}+\frac {\operatorname {arctanh}\left (\frac {2 x^{2}+8}{4 \sqrt {x^{4}+2 x^{2}+4}}\right )}{128}\) | \(60\) |
risch | \(\frac {3 x^{6}+2 x^{4}+4 x^{2}-16}{64 x^{4} \sqrt {x^{4}+2 x^{2}+4}}+\frac {\operatorname {arctanh}\left (\frac {2 x^{2}+8}{4 \sqrt {x^{4}+2 x^{2}+4}}\right )}{128}\) | \(60\) |
elliptic | \(-\frac {\sqrt {x^{4}+2 x^{2}+4}}{16 x^{4}}+\frac {3 \sqrt {x^{4}+2 x^{2}+4}}{64 x^{2}}+\frac {\operatorname {arctanh}\left (\frac {2 x^{2}+8}{4 \sqrt {x^{4}+2 x^{2}+4}}\right )}{128}\) | \(60\) |
pseudoelliptic | \(\frac {\operatorname {arctanh}\left (\frac {x^{2}+4}{2 \sqrt {x^{4}+2 x^{2}+4}}\right ) x^{4}+6 x^{2} \sqrt {x^{4}+2 x^{2}+4}-8 \sqrt {x^{4}+2 x^{2}+4}}{128 x^{4}}\) | \(62\) |
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Time = 0.25 (sec) , antiderivative size = 81, normalized size of antiderivative = 1.14 \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\frac {x^{4} \log \left (-x^{2} + \sqrt {x^{4} + 2 \, x^{2} + 4} + 2\right ) - x^{4} \log \left (-x^{2} + \sqrt {x^{4} + 2 \, x^{2} + 4} - 2\right ) + 6 \, x^{4} + 2 \, \sqrt {x^{4} + 2 \, x^{2} + 4} {\left (3 \, x^{2} - 4\right )}}{128 \, x^{4}} \]
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\[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\int \frac {1}{x^{5} \sqrt {x^{4} + 2 x^{2} + 4}}\, dx \]
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Time = 0.27 (sec) , antiderivative size = 52, normalized size of antiderivative = 0.73 \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\frac {3 \, \sqrt {x^{4} + 2 \, x^{2} + 4}}{64 \, x^{2}} - \frac {\sqrt {x^{4} + 2 \, x^{2} + 4}}{16 \, x^{4}} + \frac {1}{128} \, \operatorname {arsinh}\left (\frac {1}{3} \, \sqrt {3} + \frac {4 \, \sqrt {3}}{3 \, x^{2}}\right ) \]
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Time = 0.28 (sec) , antiderivative size = 112, normalized size of antiderivative = 1.58 \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\frac {{\left (x^{2} - \sqrt {x^{4} + 2 \, x^{2} + 4}\right )}^{3} + 36 \, x^{2} - 36 \, \sqrt {x^{4} + 2 \, x^{2} + 4} + 64}{32 \, {\left ({\left (x^{2} - \sqrt {x^{4} + 2 \, x^{2} + 4}\right )}^{2} - 4\right )}^{2}} - \frac {1}{128} \, \log \left (x^{2} - \sqrt {x^{4} + 2 \, x^{2} + 4} + 2\right ) + \frac {1}{128} \, \log \left (-x^{2} + \sqrt {x^{4} + 2 \, x^{2} + 4} + 2\right ) \]
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Timed out. \[ \int \frac {1}{x^5 \sqrt {4+2 x^2+x^4}} \, dx=\int \frac {1}{x^5\,\sqrt {x^4+2\,x^2+4}} \,d x \]
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