Integrand size = 12, antiderivative size = 33 \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{2} a A x^2+\frac {1}{3} (A b+a B) x^3+\frac {1}{4} b B x^4 \]
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Time = 0.02 (sec) , antiderivative size = 33, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.083, Rules used = {77} \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{3} x^3 (a B+A b)+\frac {1}{2} a A x^2+\frac {1}{4} b B x^4 \]
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Rule 77
Rubi steps \begin{align*} \text {integral}& = \int \left (a A x+(A b+a B) x^2+b B x^3\right ) \, dx \\ & = \frac {1}{2} a A x^2+\frac {1}{3} (A b+a B) x^3+\frac {1}{4} b B x^4 \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{12} x^2 (b x (4 A+3 B x)+a (6 A+4 B x)) \]
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Time = 0.01 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.85
method | result | size |
default | \(\frac {a A \,x^{2}}{2}+\frac {\left (A b +B a \right ) x^{3}}{3}+\frac {b B \,x^{4}}{4}\) | \(28\) |
norman | \(\frac {b B \,x^{4}}{4}+\left (\frac {A b}{3}+\frac {B a}{3}\right ) x^{3}+\frac {a A \,x^{2}}{2}\) | \(29\) |
gosper | \(\frac {1}{4} b B \,x^{4}+\frac {1}{3} x^{3} A b +\frac {1}{3} x^{3} B a +\frac {1}{2} a A \,x^{2}\) | \(30\) |
risch | \(\frac {1}{4} b B \,x^{4}+\frac {1}{3} x^{3} A b +\frac {1}{3} x^{3} B a +\frac {1}{2} a A \,x^{2}\) | \(30\) |
parallelrisch | \(\frac {1}{4} b B \,x^{4}+\frac {1}{3} x^{3} A b +\frac {1}{3} x^{3} B a +\frac {1}{2} a A \,x^{2}\) | \(30\) |
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none
Time = 0.19 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{4} x^{4} b B + \frac {1}{3} x^{3} a B + \frac {1}{3} x^{3} b A + \frac {1}{2} x^{2} a A \]
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Time = 0.02 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int x (a+b x) (A+B x) \, dx=\frac {A a x^{2}}{2} + \frac {B b x^{4}}{4} + x^{3} \left (\frac {A b}{3} + \frac {B a}{3}\right ) \]
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none
Time = 0.20 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.82 \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{4} \, B b x^{4} + \frac {1}{2} \, A a x^{2} + \frac {1}{3} \, {\left (B a + A b\right )} x^{3} \]
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none
Time = 0.27 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int x (a+b x) (A+B x) \, dx=\frac {1}{4} \, B b x^{4} + \frac {1}{3} \, B a x^{3} + \frac {1}{3} \, A b x^{3} + \frac {1}{2} \, A a x^{2} \]
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Time = 0.04 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.85 \[ \int x (a+b x) (A+B x) \, dx=\frac {B\,b\,x^4}{4}+\left (\frac {A\,b}{3}+\frac {B\,a}{3}\right )\,x^3+\frac {A\,a\,x^2}{2} \]
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