Integrand size = 18, antiderivative size = 38 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=-\frac {2 \text {arctanh}\left (\frac {b+2 c x^3}{\sqrt {b^2-4 a c}}\right )}{3 \sqrt {b^2-4 a c}} \]
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Time = 0.02 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {1366, 632, 212} \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=-\frac {2 \text {arctanh}\left (\frac {b+2 c x^3}{\sqrt {b^2-4 a c}}\right )}{3 \sqrt {b^2-4 a c}} \]
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Rule 212
Rule 632
Rule 1366
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \text {Subst}\left (\int \frac {1}{a+b x+c x^2} \, dx,x,x^3\right ) \\ & = -\left (\frac {2}{3} \text {Subst}\left (\int \frac {1}{b^2-4 a c-x^2} \, dx,x,b+2 c x^3\right )\right ) \\ & = -\frac {2 \tanh ^{-1}\left (\frac {b+2 c x^3}{\sqrt {b^2-4 a c}}\right )}{3 \sqrt {b^2-4 a c}} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.11 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=\frac {2 \arctan \left (\frac {b+2 c x^3}{\sqrt {-b^2+4 a c}}\right )}{3 \sqrt {-b^2+4 a c}} \]
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Time = 0.05 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.97
method | result | size |
default | \(\frac {2 \arctan \left (\frac {2 c \,x^{3}+b}{\sqrt {4 a c -b^{2}}}\right )}{3 \sqrt {4 a c -b^{2}}}\) | \(37\) |
risch | \(-\frac {\ln \left (\left (-b +\sqrt {-4 a c +b^{2}}\right ) x^{3}-2 a \right )}{3 \sqrt {-4 a c +b^{2}}}+\frac {\ln \left (\left (b +\sqrt {-4 a c +b^{2}}\right ) x^{3}+2 a \right )}{3 \sqrt {-4 a c +b^{2}}}\) | \(70\) |
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none
Time = 0.28 (sec) , antiderivative size = 129, normalized size of antiderivative = 3.39 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=\left [\frac {\log \left (\frac {2 \, c^{2} x^{6} + 2 \, b c x^{3} + b^{2} - 2 \, a c - {\left (2 \, c x^{3} + b\right )} \sqrt {b^{2} - 4 \, a c}}{c x^{6} + b x^{3} + a}\right )}{3 \, \sqrt {b^{2} - 4 \, a c}}, -\frac {2 \, \sqrt {-b^{2} + 4 \, a c} \arctan \left (-\frac {{\left (2 \, c x^{3} + b\right )} \sqrt {-b^{2} + 4 \, a c}}{b^{2} - 4 \, a c}\right )}{3 \, {\left (b^{2} - 4 \, a c\right )}}\right ] \]
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Leaf count of result is larger than twice the leaf count of optimal. 131 vs. \(2 (37) = 74\).
Time = 0.38 (sec) , antiderivative size = 131, normalized size of antiderivative = 3.45 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=- \frac {\sqrt {- \frac {1}{4 a c - b^{2}}} \log {\left (x^{3} + \frac {- 4 a c \sqrt {- \frac {1}{4 a c - b^{2}}} + b^{2} \sqrt {- \frac {1}{4 a c - b^{2}}} + b}{2 c} \right )}}{3} + \frac {\sqrt {- \frac {1}{4 a c - b^{2}}} \log {\left (x^{3} + \frac {4 a c \sqrt {- \frac {1}{4 a c - b^{2}}} - b^{2} \sqrt {- \frac {1}{4 a c - b^{2}}} + b}{2 c} \right )}}{3} \]
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Exception generated. \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=\text {Exception raised: ValueError} \]
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Time = 0.36 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.95 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=\frac {2 \, \arctan \left (\frac {2 \, c x^{3} + b}{\sqrt {-b^{2} + 4 \, a c}}\right )}{3 \, \sqrt {-b^{2} + 4 \, a c}} \]
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Time = 8.25 (sec) , antiderivative size = 174, normalized size of antiderivative = 4.58 \[ \int \frac {x^2}{a+b x^3+c x^6} \, dx=-\frac {2\,\mathrm {atan}\left (\frac {\frac {x^3\,{\left (4\,a\,c-b^2\right )}^4}{2}+a\,b\,{\left (4\,a\,c-b^2\right )}^3+a\,b^3\,{\left (4\,a\,c-b^2\right )}^2+b^2\,x^3\,{\left (4\,a\,c-b^2\right )}^3+\frac {b^4\,x^3\,{\left (4\,a\,c-b^2\right )}^2}{2}}{b^2\,\left (32\,a^3\,c^2\,\sqrt {4\,a\,c-b^2}-4\,a^2\,b^2\,c\,\sqrt {4\,a\,c-b^2}\right )-64\,a^4\,c^3\,\sqrt {4\,a\,c-b^2}}\right )}{3\,\sqrt {4\,a\,c-b^2}} \]
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