Integrand size = 16, antiderivative size = 71 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {B x}{b^3}-\frac {a^2 (A b-a B)}{2 b^4 (a+b x)^2}+\frac {a (2 A b-3 a B)}{b^4 (a+b x)}+\frac {(A b-3 a B) \log (a+b x)}{b^4} \]
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Time = 0.04 (sec) , antiderivative size = 71, 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} \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=-\frac {a^2 (A b-a B)}{2 b^4 (a+b x)^2}+\frac {a (2 A b-3 a B)}{b^4 (a+b x)}+\frac {(A b-3 a B) \log (a+b x)}{b^4}+\frac {B x}{b^3} \]
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Rule 78
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {B}{b^3}-\frac {a^2 (-A b+a B)}{b^3 (a+b x)^3}+\frac {a (-2 A b+3 a B)}{b^3 (a+b x)^2}+\frac {A b-3 a B}{b^3 (a+b x)}\right ) \, dx \\ & = \frac {B x}{b^3}-\frac {a^2 (A b-a B)}{2 b^4 (a+b x)^2}+\frac {a (2 A b-3 a B)}{b^4 (a+b x)}+\frac {(A b-3 a B) \log (a+b x)}{b^4} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 75, normalized size of antiderivative = 1.06 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {B x}{b^3}+\frac {-a^2 A b+a^3 B}{2 b^4 (a+b x)^2}+\frac {2 a A b-3 a^2 B}{b^4 (a+b x)}+\frac {(A b-3 a B) \log (a+b x)}{b^4} \]
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Time = 1.17 (sec) , antiderivative size = 69, normalized size of antiderivative = 0.97
method | result | size |
norman | \(\frac {\frac {B \,x^{3}}{b}+\frac {a^{2} \left (3 A b -9 B a \right )}{2 b^{4}}+\frac {2 a \left (A b -3 B a \right ) x}{b^{3}}}{\left (b x +a \right )^{2}}+\frac {\left (A b -3 B a \right ) \ln \left (b x +a \right )}{b^{4}}\) | \(69\) |
default | \(\frac {B x}{b^{3}}-\frac {a^{2} \left (A b -B a \right )}{2 b^{4} \left (b x +a \right )^{2}}+\frac {a \left (2 A b -3 B a \right )}{b^{4} \left (b x +a \right )}+\frac {\left (A b -3 B a \right ) \ln \left (b x +a \right )}{b^{4}}\) | \(70\) |
risch | \(\frac {B x}{b^{3}}+\frac {\left (2 a b A -3 a^{2} B \right ) x +\frac {a^{2} \left (3 A b -5 B a \right )}{2 b}}{b^{3} \left (b x +a \right )^{2}}+\frac {\ln \left (b x +a \right ) A}{b^{3}}-\frac {3 \ln \left (b x +a \right ) B a}{b^{4}}\) | \(75\) |
parallelrisch | \(\frac {2 A \ln \left (b x +a \right ) x^{2} b^{3}-6 B \ln \left (b x +a \right ) x^{2} a \,b^{2}+2 b^{3} B \,x^{3}+4 A \ln \left (b x +a \right ) x a \,b^{2}-12 B \ln \left (b x +a \right ) x \,a^{2} b +2 A \ln \left (b x +a \right ) a^{2} b +4 a \,b^{2} A x -6 B \ln \left (b x +a \right ) a^{3}-12 a^{2} b B x +3 a^{2} b A -9 a^{3} B}{2 b^{4} \left (b x +a \right )^{2}}\) | \(136\) |
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Time = 0.22 (sec) , antiderivative size = 134, normalized size of antiderivative = 1.89 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {2 \, B b^{3} x^{3} + 4 \, B a b^{2} x^{2} - 5 \, B a^{3} + 3 \, A a^{2} b - 4 \, {\left (B a^{2} b - A a b^{2}\right )} x - 2 \, {\left (3 \, B a^{3} - A a^{2} b + {\left (3 \, B a b^{2} - A b^{3}\right )} x^{2} + 2 \, {\left (3 \, B a^{2} b - A a b^{2}\right )} x\right )} \log \left (b x + a\right )}{2 \, {\left (b^{6} x^{2} + 2 \, a b^{5} x + a^{2} b^{4}\right )}} \]
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Time = 0.29 (sec) , antiderivative size = 83, normalized size of antiderivative = 1.17 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {B x}{b^{3}} + \frac {3 A a^{2} b - 5 B a^{3} + x \left (4 A a b^{2} - 6 B a^{2} b\right )}{2 a^{2} b^{4} + 4 a b^{5} x + 2 b^{6} x^{2}} - \frac {\left (- A b + 3 B a\right ) \log {\left (a + b x \right )}}{b^{4}} \]
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Time = 0.20 (sec) , antiderivative size = 85, normalized size of antiderivative = 1.20 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=-\frac {5 \, B a^{3} - 3 \, A a^{2} b + 2 \, {\left (3 \, B a^{2} b - 2 \, A a b^{2}\right )} x}{2 \, {\left (b^{6} x^{2} + 2 \, a b^{5} x + a^{2} b^{4}\right )}} + \frac {B x}{b^{3}} - \frac {{\left (3 \, B a - A b\right )} \log \left (b x + a\right )}{b^{4}} \]
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Time = 0.28 (sec) , antiderivative size = 72, normalized size of antiderivative = 1.01 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {B x}{b^{3}} - \frac {{\left (3 \, B a - A b\right )} \log \left ({\left | b x + a \right |}\right )}{b^{4}} - \frac {5 \, B a^{3} - 3 \, A a^{2} b + 2 \, {\left (3 \, B a^{2} b - 2 \, A a b^{2}\right )} x}{2 \, {\left (b x + a\right )}^{2} b^{4}} \]
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Time = 0.34 (sec) , antiderivative size = 85, normalized size of antiderivative = 1.20 \[ \int \frac {x^2 (A+B x)}{(a+b x)^3} \, dx=\frac {B\,x}{b^3}-\frac {\frac {5\,B\,a^3-3\,A\,a^2\,b}{2\,b}+x\,\left (3\,B\,a^2-2\,A\,a\,b\right )}{a^2\,b^3+2\,a\,b^4\,x+b^5\,x^2}+\frac {\ln \left (a+b\,x\right )\,\left (A\,b-3\,B\,a\right )}{b^4} \]
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