Integrand size = 24, antiderivative size = 84 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=-\frac {1}{2 a^4 x^2}-\frac {b}{6 a^2 \left (a+b x^2\right )^3}-\frac {b}{2 a^3 \left (a+b x^2\right )^2}-\frac {3 b}{2 a^4 \left (a+b x^2\right )}-\frac {4 b \log (x)}{a^5}+\frac {2 b \log \left (a+b x^2\right )}{a^5} \]
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Time = 0.06 (sec) , antiderivative size = 84, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {28, 272, 46} \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=\frac {2 b \log \left (a+b x^2\right )}{a^5}-\frac {4 b \log (x)}{a^5}-\frac {3 b}{2 a^4 \left (a+b x^2\right )}-\frac {1}{2 a^4 x^2}-\frac {b}{2 a^3 \left (a+b x^2\right )^2}-\frac {b}{6 a^2 \left (a+b x^2\right )^3} \]
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Rule 28
Rule 46
Rule 272
Rubi steps \begin{align*} \text {integral}& = b^4 \int \frac {1}{x^3 \left (a b+b^2 x^2\right )^4} \, dx \\ & = \frac {1}{2} b^4 \text {Subst}\left (\int \frac {1}{x^2 \left (a b+b^2 x\right )^4} \, dx,x,x^2\right ) \\ & = \frac {1}{2} b^4 \text {Subst}\left (\int \left (\frac {1}{a^4 b^4 x^2}-\frac {4}{a^5 b^3 x}+\frac {1}{a^2 b^2 (a+b x)^4}+\frac {2}{a^3 b^2 (a+b x)^3}+\frac {3}{a^4 b^2 (a+b x)^2}+\frac {4}{a^5 b^2 (a+b x)}\right ) \, dx,x,x^2\right ) \\ & = -\frac {1}{2 a^4 x^2}-\frac {b}{6 a^2 \left (a+b x^2\right )^3}-\frac {b}{2 a^3 \left (a+b x^2\right )^2}-\frac {3 b}{2 a^4 \left (a+b x^2\right )}-\frac {4 b \log (x)}{a^5}+\frac {2 b \log \left (a+b x^2\right )}{a^5} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 70, normalized size of antiderivative = 0.83 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=-\frac {\frac {a \left (3 a^3+22 a^2 b x^2+30 a b^2 x^4+12 b^3 x^6\right )}{x^2 \left (a+b x^2\right )^3}+24 b \log (x)-12 b \log \left (a+b x^2\right )}{6 a^5} \]
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Time = 0.10 (sec) , antiderivative size = 76, normalized size of antiderivative = 0.90
method | result | size |
norman | \(\frac {-\frac {1}{2 a}+\frac {6 b^{2} x^{4}}{a^{3}}+\frac {9 b^{3} x^{6}}{a^{4}}+\frac {11 b^{4} x^{8}}{3 a^{5}}}{x^{2} \left (b \,x^{2}+a \right )^{3}}-\frac {4 b \ln \left (x \right )}{a^{5}}+\frac {2 b \ln \left (b \,x^{2}+a \right )}{a^{5}}\) | \(76\) |
default | \(-\frac {1}{2 a^{4} x^{2}}-\frac {4 b \ln \left (x \right )}{a^{5}}+\frac {b^{2} \left (\frac {4 \ln \left (b \,x^{2}+a \right )}{b}-\frac {a^{2}}{b \left (b \,x^{2}+a \right )^{2}}-\frac {a^{3}}{3 b \left (b \,x^{2}+a \right )^{3}}-\frac {3 a}{b \left (b \,x^{2}+a \right )}\right )}{2 a^{5}}\) | \(89\) |
risch | \(\frac {-\frac {2 b^{3} x^{6}}{a^{4}}-\frac {5 b^{2} x^{4}}{a^{3}}-\frac {11 b \,x^{2}}{3 a^{2}}-\frac {1}{2 a}}{x^{2} \left (b^{2} x^{4}+2 a b \,x^{2}+a^{2}\right ) \left (b \,x^{2}+a \right )}-\frac {4 b \ln \left (x \right )}{a^{5}}+\frac {2 b \ln \left (-b \,x^{2}-a \right )}{a^{5}}\) | \(97\) |
parallelrisch | \(-\frac {24 b^{4} \ln \left (x \right ) x^{8}-12 \ln \left (b \,x^{2}+a \right ) x^{8} b^{4}-22 b^{4} x^{8}+72 a \,b^{3} \ln \left (x \right ) x^{6}-36 \ln \left (b \,x^{2}+a \right ) x^{6} a \,b^{3}-54 a \,b^{3} x^{6}+72 a^{2} b^{2} \ln \left (x \right ) x^{4}-36 \ln \left (b \,x^{2}+a \right ) x^{4} a^{2} b^{2}-36 a^{2} b^{2} x^{4}+24 a^{3} b \ln \left (x \right ) x^{2}-12 \ln \left (b \,x^{2}+a \right ) x^{2} a^{3} b +3 a^{4}}{6 a^{5} x^{2} \left (b^{2} x^{4}+2 a b \,x^{2}+a^{2}\right ) \left (b \,x^{2}+a \right )}\) | \(186\) |
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Leaf count of result is larger than twice the leaf count of optimal. 163 vs. \(2 (76) = 152\).
Time = 0.25 (sec) , antiderivative size = 163, normalized size of antiderivative = 1.94 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=-\frac {12 \, a b^{3} x^{6} + 30 \, a^{2} b^{2} x^{4} + 22 \, a^{3} b x^{2} + 3 \, a^{4} - 12 \, {\left (b^{4} x^{8} + 3 \, a b^{3} x^{6} + 3 \, a^{2} b^{2} x^{4} + a^{3} b x^{2}\right )} \log \left (b x^{2} + a\right ) + 24 \, {\left (b^{4} x^{8} + 3 \, a b^{3} x^{6} + 3 \, a^{2} b^{2} x^{4} + a^{3} b x^{2}\right )} \log \left (x\right )}{6 \, {\left (a^{5} b^{3} x^{8} + 3 \, a^{6} b^{2} x^{6} + 3 \, a^{7} b x^{4} + a^{8} x^{2}\right )}} \]
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Time = 0.34 (sec) , antiderivative size = 102, normalized size of antiderivative = 1.21 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=\frac {- 3 a^{3} - 22 a^{2} b x^{2} - 30 a b^{2} x^{4} - 12 b^{3} x^{6}}{6 a^{7} x^{2} + 18 a^{6} b x^{4} + 18 a^{5} b^{2} x^{6} + 6 a^{4} b^{3} x^{8}} - \frac {4 b \log {\left (x \right )}}{a^{5}} + \frac {2 b \log {\left (\frac {a}{b} + x^{2} \right )}}{a^{5}} \]
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Time = 0.19 (sec) , antiderivative size = 99, normalized size of antiderivative = 1.18 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=-\frac {12 \, b^{3} x^{6} + 30 \, a b^{2} x^{4} + 22 \, a^{2} b x^{2} + 3 \, a^{3}}{6 \, {\left (a^{4} b^{3} x^{8} + 3 \, a^{5} b^{2} x^{6} + 3 \, a^{6} b x^{4} + a^{7} x^{2}\right )}} + \frac {2 \, b \log \left (b x^{2} + a\right )}{a^{5}} - \frac {2 \, b \log \left (x^{2}\right )}{a^{5}} \]
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Time = 0.31 (sec) , antiderivative size = 93, normalized size of antiderivative = 1.11 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=-\frac {2 \, b \log \left (x^{2}\right )}{a^{5}} + \frac {2 \, b \log \left ({\left | b x^{2} + a \right |}\right )}{a^{5}} + \frac {4 \, b x^{2} - a}{2 \, a^{5} x^{2}} - \frac {22 \, b^{4} x^{6} + 75 \, a b^{3} x^{4} + 87 \, a^{2} b^{2} x^{2} + 35 \, a^{3} b}{6 \, {\left (b x^{2} + a\right )}^{3} a^{5}} \]
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Time = 13.27 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.15 \[ \int \frac {1}{x^3 \left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx=\frac {2\,b\,\ln \left (b\,x^2+a\right )}{a^5}-\frac {\frac {1}{2\,a}+\frac {11\,b\,x^2}{3\,a^2}+\frac {5\,b^2\,x^4}{a^3}+\frac {2\,b^3\,x^6}{a^4}}{a^3\,x^2+3\,a^2\,b\,x^4+3\,a\,b^2\,x^6+b^3\,x^8}-\frac {4\,b\,\ln \left (x\right )}{a^5} \]
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