Optimal. Leaf size=90 \[ \frac{a^3 (A b-a B)}{b^5 (a+b x)}+\frac{a^2 (3 A b-4 a B) \log (a+b x)}{b^5}+\frac{x^2 (A b-2 a B)}{2 b^3}-\frac{a x (2 A b-3 a B)}{b^4}+\frac{B x^3}{3 b^2} \]
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Rubi [A] time = 0.0751968, antiderivative size = 90, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.062, Rules used = {77} \[ \frac{a^3 (A b-a B)}{b^5 (a+b x)}+\frac{a^2 (3 A b-4 a B) \log (a+b x)}{b^5}+\frac{x^2 (A b-2 a B)}{2 b^3}-\frac{a x (2 A b-3 a B)}{b^4}+\frac{B x^3}{3 b^2} \]
Antiderivative was successfully verified.
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Rule 77
Rubi steps
\begin{align*} \int \frac{x^3 (A+B x)}{(a+b x)^2} \, dx &=\int \left (\frac{a (-2 A b+3 a B)}{b^4}+\frac{(A b-2 a B) x}{b^3}+\frac{B x^2}{b^2}+\frac{a^3 (-A b+a B)}{b^4 (a+b x)^2}-\frac{a^2 (-3 A b+4 a B)}{b^4 (a+b x)}\right ) \, dx\\ &=-\frac{a (2 A b-3 a B) x}{b^4}+\frac{(A b-2 a B) x^2}{2 b^3}+\frac{B x^3}{3 b^2}+\frac{a^3 (A b-a B)}{b^5 (a+b x)}+\frac{a^2 (3 A b-4 a B) \log (a+b x)}{b^5}\\ \end{align*}
Mathematica [A] time = 0.0521868, size = 87, normalized size = 0.97 \[ \frac{\frac{6 a^3 (A b-a B)}{a+b x}+6 a^2 (3 A b-4 a B) \log (a+b x)+3 b^2 x^2 (A b-2 a B)+6 a b x (3 a B-2 A b)+2 b^3 B x^3}{6 b^5} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.006, size = 109, normalized size = 1.2 \begin{align*}{\frac{B{x}^{3}}{3\,{b}^{2}}}+{\frac{A{x}^{2}}{2\,{b}^{2}}}-{\frac{B{x}^{2}a}{{b}^{3}}}-2\,{\frac{aAx}{{b}^{3}}}+3\,{\frac{{a}^{2}Bx}{{b}^{4}}}+{\frac{{a}^{3}A}{{b}^{4} \left ( bx+a \right ) }}-{\frac{B{a}^{4}}{{b}^{5} \left ( bx+a \right ) }}+3\,{\frac{{a}^{2}\ln \left ( bx+a \right ) A}{{b}^{4}}}-4\,{\frac{{a}^{3}\ln \left ( bx+a \right ) B}{{b}^{5}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.0417, size = 136, normalized size = 1.51 \begin{align*} -\frac{B a^{4} - A a^{3} b}{b^{6} x + a b^{5}} + \frac{2 \, B b^{2} x^{3} - 3 \,{\left (2 \, B a b - A b^{2}\right )} x^{2} + 6 \,{\left (3 \, B a^{2} - 2 \, A a b\right )} x}{6 \, b^{4}} - \frac{{\left (4 \, B a^{3} - 3 \, A a^{2} b\right )} \log \left (b x + a\right )}{b^{5}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.93743, size = 297, normalized size = 3.3 \begin{align*} \frac{2 \, B b^{4} x^{4} - 6 \, B a^{4} + 6 \, A a^{3} b -{\left (4 \, B a b^{3} - 3 \, A b^{4}\right )} x^{3} + 3 \,{\left (4 \, B a^{2} b^{2} - 3 \, A a b^{3}\right )} x^{2} + 6 \,{\left (3 \, B a^{3} b - 2 \, A a^{2} b^{2}\right )} x - 6 \,{\left (4 \, B a^{4} - 3 \, A a^{3} b +{\left (4 \, B a^{3} b - 3 \, A a^{2} b^{2}\right )} x\right )} \log \left (b x + a\right )}{6 \,{\left (b^{6} x + a b^{5}\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.730671, size = 90, normalized size = 1. \begin{align*} \frac{B x^{3}}{3 b^{2}} - \frac{a^{2} \left (- 3 A b + 4 B a\right ) \log{\left (a + b x \right )}}{b^{5}} - \frac{- A a^{3} b + B a^{4}}{a b^{5} + b^{6} x} - \frac{x^{2} \left (- A b + 2 B a\right )}{2 b^{3}} + \frac{x \left (- 2 A a b + 3 B a^{2}\right )}{b^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.20621, size = 194, normalized size = 2.16 \begin{align*} \frac{{\left (b x + a\right )}^{3}{\left (2 \, B - \frac{3 \,{\left (4 \, B a b - A b^{2}\right )}}{{\left (b x + a\right )} b} + \frac{18 \,{\left (2 \, B a^{2} b^{2} - A a b^{3}\right )}}{{\left (b x + a\right )}^{2} b^{2}}\right )}}{6 \, b^{5}} + \frac{{\left (4 \, B a^{3} - 3 \, A a^{2} b\right )} \log \left (\frac{{\left | b x + a \right |}}{{\left (b x + a\right )}^{2}{\left | b \right |}}\right )}{b^{5}} - \frac{\frac{B a^{4} b^{3}}{b x + a} - \frac{A a^{3} b^{4}}{b x + a}}{b^{8}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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