Integrand size = 16, antiderivative size = 86 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=-\frac {A}{3 a x^3}+\frac {A b-a B}{2 a^2 x^2}-\frac {b (A b-a B)}{a^3 x}-\frac {b^2 (A b-a B) \log (x)}{a^4}+\frac {b^2 (A b-a B) \log (a+b x)}{a^4} \]
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Time = 0.04 (sec) , antiderivative size = 86, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.062, Rules used = {78} \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=-\frac {b^2 \log (x) (A b-a B)}{a^4}+\frac {b^2 (A b-a B) \log (a+b x)}{a^4}-\frac {b (A b-a B)}{a^3 x}+\frac {A b-a B}{2 a^2 x^2}-\frac {A}{3 a x^3} \]
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Rule 78
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {A}{a x^4}+\frac {-A b+a B}{a^2 x^3}-\frac {b (-A b+a B)}{a^3 x^2}+\frac {b^2 (-A b+a B)}{a^4 x}-\frac {b^3 (-A b+a B)}{a^4 (a+b x)}\right ) \, dx \\ & = -\frac {A}{3 a x^3}+\frac {A b-a B}{2 a^2 x^2}-\frac {b (A b-a B)}{a^3 x}-\frac {b^2 (A b-a B) \log (x)}{a^4}+\frac {b^2 (A b-a B) \log (a+b x)}{a^4} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 81, normalized size of antiderivative = 0.94 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=\frac {\frac {a \left (-6 A b^2 x^2+3 a b x (A+2 B x)-a^2 (2 A+3 B x)\right )}{x^3}+6 b^2 (-A b+a B) \log (x)+6 b^2 (A b-a B) \log (a+b x)}{6 a^4} \]
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Time = 0.44 (sec) , antiderivative size = 83, normalized size of antiderivative = 0.97
method | result | size |
default | \(-\frac {A}{3 a \,x^{3}}-\frac {-A b +B a}{2 a^{2} x^{2}}-\frac {b \left (A b -B a \right )}{a^{3} x}-\frac {b^{2} \left (A b -B a \right ) \ln \left (x \right )}{a^{4}}+\frac {b^{2} \left (A b -B a \right ) \ln \left (b x +a \right )}{a^{4}}\) | \(83\) |
norman | \(\frac {-\frac {A}{3 a}+\frac {\left (A b -B a \right ) x}{2 a^{2}}-\frac {\left (A b -B a \right ) b \,x^{2}}{a^{3}}}{x^{3}}+\frac {b^{2} \left (A b -B a \right ) \ln \left (b x +a \right )}{a^{4}}-\frac {b^{2} \left (A b -B a \right ) \ln \left (x \right )}{a^{4}}\) | \(83\) |
risch | \(\frac {-\frac {A}{3 a}+\frac {\left (A b -B a \right ) x}{2 a^{2}}-\frac {\left (A b -B a \right ) b \,x^{2}}{a^{3}}}{x^{3}}-\frac {b^{3} \ln \left (x \right ) A}{a^{4}}+\frac {b^{2} \ln \left (x \right ) B}{a^{3}}+\frac {b^{3} \ln \left (-b x -a \right ) A}{a^{4}}-\frac {b^{2} \ln \left (-b x -a \right ) B}{a^{3}}\) | \(100\) |
parallelrisch | \(-\frac {6 A \ln \left (x \right ) x^{3} b^{3}-6 A \ln \left (b x +a \right ) x^{3} b^{3}-6 B \ln \left (x \right ) x^{3} a \,b^{2}+6 B \ln \left (b x +a \right ) x^{3} a \,b^{2}+6 a A \,b^{2} x^{2}-6 B \,a^{2} b \,x^{2}-3 a^{2} A b x +3 a^{3} B x +2 a^{3} A}{6 a^{4} x^{3}}\) | \(105\) |
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none
Time = 0.23 (sec) , antiderivative size = 94, normalized size of antiderivative = 1.09 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=-\frac {6 \, {\left (B a b^{2} - A b^{3}\right )} x^{3} \log \left (b x + a\right ) - 6 \, {\left (B a b^{2} - A b^{3}\right )} x^{3} \log \left (x\right ) + 2 \, A a^{3} - 6 \, {\left (B a^{2} b - A a b^{2}\right )} x^{2} + 3 \, {\left (B a^{3} - A a^{2} b\right )} x}{6 \, a^{4} x^{3}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 165 vs. \(2 (75) = 150\).
Time = 0.26 (sec) , antiderivative size = 165, normalized size of antiderivative = 1.92 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=\frac {- 2 A a^{2} + x^{2} \left (- 6 A b^{2} + 6 B a b\right ) + x \left (3 A a b - 3 B a^{2}\right )}{6 a^{3} x^{3}} + \frac {b^{2} \left (- A b + B a\right ) \log {\left (x + \frac {- A a b^{3} + B a^{2} b^{2} - a b^{2} \left (- A b + B a\right )}{- 2 A b^{4} + 2 B a b^{3}} \right )}}{a^{4}} - \frac {b^{2} \left (- A b + B a\right ) \log {\left (x + \frac {- A a b^{3} + B a^{2} b^{2} + a b^{2} \left (- A b + B a\right )}{- 2 A b^{4} + 2 B a b^{3}} \right )}}{a^{4}} \]
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Time = 0.19 (sec) , antiderivative size = 89, normalized size of antiderivative = 1.03 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=-\frac {{\left (B a b^{2} - A b^{3}\right )} \log \left (b x + a\right )}{a^{4}} + \frac {{\left (B a b^{2} - A b^{3}\right )} \log \left (x\right )}{a^{4}} - \frac {2 \, A a^{2} - 6 \, {\left (B a b - A b^{2}\right )} x^{2} + 3 \, {\left (B a^{2} - A a b\right )} x}{6 \, a^{3} x^{3}} \]
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Time = 0.27 (sec) , antiderivative size = 99, normalized size of antiderivative = 1.15 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=\frac {{\left (B a b^{2} - A b^{3}\right )} \log \left ({\left | x \right |}\right )}{a^{4}} - \frac {{\left (B a b^{3} - A b^{4}\right )} \log \left ({\left | b x + a \right |}\right )}{a^{4} b} - \frac {2 \, A a^{3} - 6 \, {\left (B a^{2} b - A a b^{2}\right )} x^{2} + 3 \, {\left (B a^{3} - A a^{2} b\right )} x}{6 \, a^{4} x^{3}} \]
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Time = 0.10 (sec) , antiderivative size = 96, normalized size of antiderivative = 1.12 \[ \int \frac {A+B x}{x^4 (a+b x)} \, dx=\frac {2\,b^2\,\mathrm {atanh}\left (\frac {b^2\,\left (A\,b-B\,a\right )\,\left (a+2\,b\,x\right )}{a\,\left (A\,b^3-B\,a\,b^2\right )}\right )\,\left (A\,b-B\,a\right )}{a^4}-\frac {\frac {A}{3\,a}-\frac {x\,\left (A\,b-B\,a\right )}{2\,a^2}+\frac {b\,x^2\,\left (A\,b-B\,a\right )}{a^3}}{x^3} \]
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