Integrand size = 12, antiderivative size = 74 \[ \int \frac {1}{1-x^2+x^4} \, dx=-\frac {1}{2} \arctan \left (\sqrt {3}-2 x\right )+\frac {1}{2} \arctan \left (\sqrt {3}+2 x\right )-\frac {\log \left (1-\sqrt {3} x+x^2\right )}{4 \sqrt {3}}+\frac {\log \left (1+\sqrt {3} x+x^2\right )}{4 \sqrt {3}} \]
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Time = 0.03 (sec) , antiderivative size = 74, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.417, Rules used = {1108, 648, 632, 210, 642} \[ \int \frac {1}{1-x^2+x^4} \, dx=-\frac {1}{2} \arctan \left (\sqrt {3}-2 x\right )+\frac {1}{2} \arctan \left (2 x+\sqrt {3}\right )-\frac {\log \left (x^2-\sqrt {3} x+1\right )}{4 \sqrt {3}}+\frac {\log \left (x^2+\sqrt {3} x+1\right )}{4 \sqrt {3}} \]
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Rule 210
Rule 632
Rule 642
Rule 648
Rule 1108
Rubi steps \begin{align*} \text {integral}& = \frac {\int \frac {\sqrt {3}-x}{1-\sqrt {3} x+x^2} \, dx}{2 \sqrt {3}}+\frac {\int \frac {\sqrt {3}+x}{1+\sqrt {3} x+x^2} \, dx}{2 \sqrt {3}} \\ & = \frac {1}{4} \int \frac {1}{1-\sqrt {3} x+x^2} \, dx+\frac {1}{4} \int \frac {1}{1+\sqrt {3} x+x^2} \, dx-\frac {\int \frac {-\sqrt {3}+2 x}{1-\sqrt {3} x+x^2} \, dx}{4 \sqrt {3}}+\frac {\int \frac {\sqrt {3}+2 x}{1+\sqrt {3} x+x^2} \, dx}{4 \sqrt {3}} \\ & = -\frac {\log \left (1-\sqrt {3} x+x^2\right )}{4 \sqrt {3}}+\frac {\log \left (1+\sqrt {3} x+x^2\right )}{4 \sqrt {3}}-\frac {1}{2} \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,-\sqrt {3}+2 x\right )-\frac {1}{2} \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,\sqrt {3}+2 x\right ) \\ & = -\frac {1}{2} \tan ^{-1}\left (\sqrt {3}-2 x\right )+\frac {1}{2} \tan ^{-1}\left (\sqrt {3}+2 x\right )-\frac {\log \left (1-\sqrt {3} x+x^2\right )}{4 \sqrt {3}}+\frac {\log \left (1+\sqrt {3} x+x^2\right )}{4 \sqrt {3}} \\ \end{align*}
Result contains complex when optimal does not.
Time = 0.06 (sec) , antiderivative size = 77, normalized size of antiderivative = 1.04 \[ \int \frac {1}{1-x^2+x^4} \, dx=\frac {i \left (\sqrt {-1-i \sqrt {3}} \arctan \left (\frac {1}{2} \left (1-i \sqrt {3}\right ) x\right )-\sqrt {-1+i \sqrt {3}} \arctan \left (\frac {1}{2} \left (1+i \sqrt {3}\right ) x\right )\right )}{\sqrt {6}} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 0.05 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.47
method | result | size |
risch | \(\frac {\left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (\textit {\_Z}^{4}-\textit {\_Z}^{2}+1\right )}{\sum }\frac {\ln \left (x -\textit {\_R} \right )}{2 \textit {\_R}^{3}-\textit {\_R}}\right )}{2}\) | \(35\) |
default | \(\frac {\arctan \left (2 x -\sqrt {3}\right )}{2}+\frac {\arctan \left (2 x +\sqrt {3}\right )}{2}-\frac {\ln \left (1+x^{2}-x \sqrt {3}\right ) \sqrt {3}}{12}+\frac {\ln \left (1+x^{2}+x \sqrt {3}\right ) \sqrt {3}}{12}\) | \(57\) |
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Result contains complex when optimal does not.
Time = 0.25 (sec) , antiderivative size = 157, normalized size of antiderivative = 2.12 \[ \int \frac {1}{1-x^2+x^4} \, dx=-\frac {1}{12} \, \sqrt {6} \sqrt {i \, \sqrt {3} - 1} \log \left (\sqrt {6} \sqrt {i \, \sqrt {3} - 1} {\left (i \, \sqrt {3} - 3\right )} + 12 \, x\right ) + \frac {1}{12} \, \sqrt {6} \sqrt {i \, \sqrt {3} - 1} \log \left (\sqrt {6} \sqrt {i \, \sqrt {3} - 1} {\left (-i \, \sqrt {3} + 3\right )} + 12 \, x\right ) + \frac {1}{12} \, \sqrt {6} \sqrt {-i \, \sqrt {3} - 1} \log \left (\sqrt {6} {\left (i \, \sqrt {3} + 3\right )} \sqrt {-i \, \sqrt {3} - 1} + 12 \, x\right ) - \frac {1}{12} \, \sqrt {6} \sqrt {-i \, \sqrt {3} - 1} \log \left (\sqrt {6} \sqrt {-i \, \sqrt {3} - 1} {\left (-i \, \sqrt {3} - 3\right )} + 12 \, x\right ) \]
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Time = 0.09 (sec) , antiderivative size = 63, normalized size of antiderivative = 0.85 \[ \int \frac {1}{1-x^2+x^4} \, dx=- \frac {\sqrt {3} \log {\left (x^{2} - \sqrt {3} x + 1 \right )}}{12} + \frac {\sqrt {3} \log {\left (x^{2} + \sqrt {3} x + 1 \right )}}{12} + \frac {\operatorname {atan}{\left (2 x - \sqrt {3} \right )}}{2} + \frac {\operatorname {atan}{\left (2 x + \sqrt {3} \right )}}{2} \]
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\[ \int \frac {1}{1-x^2+x^4} \, dx=\int { \frac {1}{x^{4} - x^{2} + 1} \,d x } \]
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none
Time = 0.29 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.76 \[ \int \frac {1}{1-x^2+x^4} \, dx=\frac {1}{12} \, \sqrt {3} \log \left (x^{2} + \sqrt {3} x + 1\right ) - \frac {1}{12} \, \sqrt {3} \log \left (x^{2} - \sqrt {3} x + 1\right ) + \frac {1}{2} \, \arctan \left (2 \, x + \sqrt {3}\right ) + \frac {1}{2} \, \arctan \left (2 \, x - \sqrt {3}\right ) \]
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Time = 0.11 (sec) , antiderivative size = 47, normalized size of antiderivative = 0.64 \[ \int \frac {1}{1-x^2+x^4} \, dx=\mathrm {atan}\left (\frac {2\,x}{-1+\sqrt {3}\,1{}\mathrm {i}}\right )\,\left (-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right )+\mathrm {atan}\left (\frac {2\,x}{1+\sqrt {3}\,1{}\mathrm {i}}\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right ) \]
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