Integrand size = 16, antiderivative size = 79 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {\arctan \left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}}-\frac {\text {arctanh}\left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}} \]
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Time = 0.02 (sec) , antiderivative size = 79, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.188, Rules used = {304, 209, 212} \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {\arctan \left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}}-\frac {\text {arctanh}\left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}} \]
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Rule 209
Rule 212
Rule 304
Rubi steps \begin{align*} \text {integral}& = -\left (\frac {1}{2} \int \frac {1}{\sqrt {2} \sqrt {-a-b}-x^2} \, dx\right )+\frac {1}{2} \int \frac {1}{\sqrt {2} \sqrt {-a-b}+x^2} \, dx \\ & = \frac {\tan ^{-1}\left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}}-\frac {\tanh ^{-1}\left (\frac {x}{\sqrt [4]{2} \sqrt [4]{-a-b}}\right )}{2 \sqrt [4]{2} \sqrt [4]{-a-b}} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 128, normalized size of antiderivative = 1.62 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {-2 \arctan \left (1-\frac {\sqrt [4]{2} x}{\sqrt [4]{a+b}}\right )+2 \arctan \left (1+\frac {\sqrt [4]{2} x}{\sqrt [4]{a+b}}\right )+\log \left (2 \sqrt {a+b}-2 \sqrt [4]{2} \sqrt [4]{a+b} x+\sqrt {2} x^2\right )-\log \left (2 \sqrt {a+b}+2 \sqrt [4]{2} \sqrt [4]{a+b} x+\sqrt {2} x^2\right )}{4\ 2^{3/4} \sqrt [4]{a+b}} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 3.92 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.34
method | result | size |
risch | \(\frac {\left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (\textit {\_Z}^{4}+2 a +2 b \right )}{\sum }\frac {\ln \left (x -\textit {\_R} \right )}{\textit {\_R}}\right )}{4}\) | \(27\) |
default | \(\frac {\sqrt {2}\, \left (\ln \left (\frac {x^{2}-\left (2 a +2 b \right )^{\frac {1}{4}} x \sqrt {2}+\sqrt {2 a +2 b}}{x^{2}+\left (2 a +2 b \right )^{\frac {1}{4}} x \sqrt {2}+\sqrt {2 a +2 b}}\right )+2 \arctan \left (\frac {\sqrt {2}\, x}{\left (2 a +2 b \right )^{\frac {1}{4}}}+1\right )+2 \arctan \left (\frac {\sqrt {2}\, x}{\left (2 a +2 b \right )^{\frac {1}{4}}}-1\right )\right )}{8 \left (2 a +2 b \right )^{\frac {1}{4}}}\) | \(113\) |
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Result contains complex when optimal does not.
Time = 0.27 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.84 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {1}{4} \, \left (\frac {1}{2}\right )^{\frac {1}{4}} \left (-\frac {1}{a + b}\right )^{\frac {1}{4}} \log \left (2 \, \left (\frac {1}{2}\right )^{\frac {3}{4}} {\left (a + b\right )} \left (-\frac {1}{a + b}\right )^{\frac {3}{4}} + x\right ) - \frac {1}{4} \, \left (\frac {1}{2}\right )^{\frac {1}{4}} \left (-\frac {1}{a + b}\right )^{\frac {1}{4}} \log \left (-2 \, \left (\frac {1}{2}\right )^{\frac {3}{4}} {\left (a + b\right )} \left (-\frac {1}{a + b}\right )^{\frac {3}{4}} + x\right ) + \frac {1}{4} i \, \left (\frac {1}{2}\right )^{\frac {1}{4}} \left (-\frac {1}{a + b}\right )^{\frac {1}{4}} \log \left (-2 \, \left (\frac {1}{2}\right )^{\frac {3}{4}} {\left (i \, a + i \, b\right )} \left (-\frac {1}{a + b}\right )^{\frac {3}{4}} + x\right ) - \frac {1}{4} i \, \left (\frac {1}{2}\right )^{\frac {1}{4}} \left (-\frac {1}{a + b}\right )^{\frac {1}{4}} \log \left (-2 \, \left (\frac {1}{2}\right )^{\frac {3}{4}} {\left (-i \, a - i \, b\right )} \left (-\frac {1}{a + b}\right )^{\frac {3}{4}} + x\right ) \]
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Time = 0.10 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.37 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\operatorname {RootSum} {\left (t^{4} \cdot \left (512 a + 512 b\right ) + 1, \left ( t \mapsto t \log {\left (128 t^{3} a + 128 t^{3} b + x \right )} \right )\right )} \]
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Leaf count of result is larger than twice the leaf count of optimal. 179 vs. \(2 (61) = 122\).
Time = 0.29 (sec) , antiderivative size = 179, normalized size of antiderivative = 2.27 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {\sqrt {2} \arctan \left (\frac {\sqrt {2} {\left (2 \, x + \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}\right )}}{2 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}}\right )}{4 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}} + \frac {\sqrt {2} \arctan \left (\frac {\sqrt {2} {\left (2 \, x - \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}\right )}}{2 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}}\right )}{4 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}} - \frac {\sqrt {2} \log \left (x^{2} + \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}} x + \sqrt {2 \, a + 2 \, b}\right )}{8 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}} + \frac {\sqrt {2} \log \left (x^{2} - \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}} x + \sqrt {2 \, a + 2 \, b}\right )}{8 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 219 vs. \(2 (61) = 122\).
Time = 0.28 (sec) , antiderivative size = 219, normalized size of antiderivative = 2.77 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {{\left (2 \, a + 2 \, b\right )}^{\frac {3}{4}} \arctan \left (\frac {\sqrt {2} {\left (2 \, x + \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}\right )}}{2 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}}\right )}{4 \, {\left (\sqrt {2} a + \sqrt {2} b\right )}} + \frac {{\left (2 \, a + 2 \, b\right )}^{\frac {3}{4}} \arctan \left (\frac {\sqrt {2} {\left (2 \, x - \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}\right )}}{2 \, {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}}}\right )}{4 \, {\left (\sqrt {2} a + \sqrt {2} b\right )}} - \frac {{\left (2 \, a + 2 \, b\right )}^{\frac {3}{4}} \log \left (x^{2} + \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}} x + \sqrt {2 \, a + 2 \, b}\right )}{8 \, {\left (\sqrt {2} a + \sqrt {2} b\right )}} + \frac {{\left (2 \, a + 2 \, b\right )}^{\frac {3}{4}} \log \left (x^{2} - \sqrt {2} {\left (2 \, a + 2 \, b\right )}^{\frac {1}{4}} x + \sqrt {2 \, a + 2 \, b}\right )}{8 \, {\left (\sqrt {2} a + \sqrt {2} b\right )}} \]
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Time = 0.14 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.67 \[ \int \frac {x^2}{2 a+2 b+x^4} \, dx=\frac {8^{1/4}\,\mathrm {atan}\left (\frac {8^{1/4}\,x}{2\,{\left (-a-b\right )}^{1/4}}\right )-8^{1/4}\,\mathrm {atanh}\left (\frac {8^{1/4}\,x}{2\,{\left (-a-b\right )}^{1/4}}\right )}{4\,{\left (-a-b\right )}^{1/4}} \]
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