Integrand size = 24, antiderivative size = 133 \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=-\frac {3 a^2}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {a^3}{2 b^4 (a+b x) \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {x (a+b x)}{b^3 \sqrt {a^2+2 a b x+b^2 x^2}}-\frac {3 a (a+b x) \log (a+b x)}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}} \]
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Time = 0.04 (sec) , antiderivative size = 133, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.083, Rules used = {660, 45} \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=-\frac {3 a^2}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}}-\frac {3 a (a+b x) \log (a+b x)}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {x (a+b x)}{b^3 \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {a^3}{2 b^4 (a+b x) \sqrt {a^2+2 a b x+b^2 x^2}} \]
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Rule 45
Rule 660
Rubi steps \begin{align*} \text {integral}& = \frac {\left (b^2 \left (a b+b^2 x\right )\right ) \int \frac {x^3}{\left (a b+b^2 x\right )^3} \, dx}{\sqrt {a^2+2 a b x+b^2 x^2}} \\ & = \frac {\left (b^2 \left (a b+b^2 x\right )\right ) \int \left (\frac {1}{b^6}-\frac {a^3}{b^6 (a+b x)^3}+\frac {3 a^2}{b^6 (a+b x)^2}-\frac {3 a}{b^6 (a+b x)}\right ) \, dx}{\sqrt {a^2+2 a b x+b^2 x^2}} \\ & = -\frac {3 a^2}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {a^3}{2 b^4 (a+b x) \sqrt {a^2+2 a b x+b^2 x^2}}+\frac {x (a+b x)}{b^3 \sqrt {a^2+2 a b x+b^2 x^2}}-\frac {3 a (a+b x) \log (a+b x)}{b^4 \sqrt {a^2+2 a b x+b^2 x^2}} \\ \end{align*}
Time = 1.03 (sec) , antiderivative size = 71, normalized size of antiderivative = 0.53 \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\frac {-5 a^3-4 a^2 b x+4 a b^2 x^2+2 b^3 x^3-6 a (a+b x)^2 \log (a+b x)}{2 b^4 (a+b x) \sqrt {(a+b x)^2}} \]
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Time = 2.10 (sec) , antiderivative size = 86, normalized size of antiderivative = 0.65
method | result | size |
risch | \(\frac {\sqrt {\left (b x +a \right )^{2}}\, x}{\left (b x +a \right ) b^{3}}+\frac {\sqrt {\left (b x +a \right )^{2}}\, \left (-3 a^{2} x -\frac {5 a^{3}}{2 b}\right )}{\left (b x +a \right )^{3} b^{3}}-\frac {3 \sqrt {\left (b x +a \right )^{2}}\, a \ln \left (b x +a \right )}{\left (b x +a \right ) b^{4}}\) | \(86\) |
default | \(-\frac {\left (6 \ln \left (b x +a \right ) x^{2} a \,b^{2}-2 b^{3} x^{3}+12 \ln \left (b x +a \right ) a^{2} b x -4 a \,b^{2} x^{2}+6 a^{3} \ln \left (b x +a \right )+4 a^{2} b x +5 a^{3}\right ) \left (b x +a \right )}{2 b^{4} \left (\left (b x +a \right )^{2}\right )^{\frac {3}{2}}}\) | \(89\) |
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Time = 0.25 (sec) , antiderivative size = 83, normalized size of antiderivative = 0.62 \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\frac {2 \, b^{3} x^{3} + 4 \, a b^{2} x^{2} - 4 \, a^{2} b x - 5 \, a^{3} - 6 \, {\left (a b^{2} x^{2} + 2 \, a^{2} b x + a^{3}\right )} \log \left (b x + a\right )}{2 \, {\left (b^{6} x^{2} + 2 \, a b^{5} x + a^{2} b^{4}\right )}} \]
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\[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\int \frac {x^{3}}{\left (\left (a + b x\right )^{2}\right )^{\frac {3}{2}}}\, dx \]
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Time = 0.19 (sec) , antiderivative size = 101, normalized size of antiderivative = 0.76 \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\frac {x^{2}}{\sqrt {b^{2} x^{2} + 2 \, a b x + a^{2}} b^{2}} - \frac {3 \, a \log \left (x + \frac {a}{b}\right )}{b^{4}} + \frac {2 \, a^{2}}{\sqrt {b^{2} x^{2} + 2 \, a b x + a^{2}} b^{4}} - \frac {6 \, a^{2} x}{b^{5} {\left (x + \frac {a}{b}\right )}^{2}} - \frac {11 \, a^{3}}{2 \, b^{6} {\left (x + \frac {a}{b}\right )}^{2}} \]
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Time = 0.27 (sec) , antiderivative size = 68, normalized size of antiderivative = 0.51 \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\frac {x}{b^{3} \mathrm {sgn}\left (b x + a\right )} - \frac {3 \, a \log \left ({\left | b x + a \right |}\right )}{b^{4} \mathrm {sgn}\left (b x + a\right )} - \frac {6 \, a^{2} b x + 5 \, a^{3}}{2 \, {\left (b x + a\right )}^{2} b^{4} \mathrm {sgn}\left (b x + a\right )} \]
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Timed out. \[ \int \frac {x^3}{\left (a^2+2 a b x+b^2 x^2\right )^{3/2}} \, dx=\int \frac {x^3}{{\left (a^2+2\,a\,b\,x+b^2\,x^2\right )}^{3/2}} \,d x \]
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