Integrand size = 20, antiderivative size = 42 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=\frac {a^2 c (e x)^{1+m}}{e (1+m)}-\frac {b^2 c (e x)^{3+m}}{e^3 (3+m)} \]
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Time = 0.01 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.100, Rules used = {74, 14} \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=\frac {a^2 c (e x)^{m+1}}{e (m+1)}-\frac {b^2 c (e x)^{m+3}}{e^3 (m+3)} \]
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Rule 14
Rule 74
Rubi steps \begin{align*} \text {integral}& = \int (e x)^m \left (a^2 c-b^2 c x^2\right ) \, dx \\ & = \int \left (a^2 c (e x)^m-\frac {b^2 c (e x)^{2+m}}{e^2}\right ) \, dx \\ & = \frac {a^2 c (e x)^{1+m}}{e (1+m)}-\frac {b^2 c (e x)^{3+m}}{e^3 (3+m)} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.74 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=c x (e x)^m \left (\frac {a^2}{1+m}-\frac {b^2 x^2}{3+m}\right ) \]
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Time = 0.03 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.98
method | result | size |
norman | \(\frac {a^{2} c x \,{\mathrm e}^{m \ln \left (e x \right )}}{1+m}-\frac {b^{2} c \,x^{3} {\mathrm e}^{m \ln \left (e x \right )}}{3+m}\) | \(41\) |
gosper | \(\frac {c \left (e x \right )^{m} \left (-m \,x^{2} b^{2}-b^{2} x^{2}+a^{2} m +3 a^{2}\right ) x}{\left (3+m \right ) \left (1+m \right )}\) | \(47\) |
risch | \(\frac {c \left (e x \right )^{m} \left (-m \,x^{2} b^{2}-b^{2} x^{2}+a^{2} m +3 a^{2}\right ) x}{\left (3+m \right ) \left (1+m \right )}\) | \(47\) |
parallelrisch | \(-\frac {x^{3} \left (e x \right )^{m} b^{2} c m +x^{3} \left (e x \right )^{m} b^{2} c -x \left (e x \right )^{m} a^{2} c m -3 x \left (e x \right )^{m} a^{2} c}{\left (3+m \right ) \left (1+m \right )}\) | \(66\) |
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Time = 0.23 (sec) , antiderivative size = 50, normalized size of antiderivative = 1.19 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=-\frac {{\left ({\left (b^{2} c m + b^{2} c\right )} x^{3} - {\left (a^{2} c m + 3 \, a^{2} c\right )} x\right )} \left (e x\right )^{m}}{m^{2} + 4 \, m + 3} \]
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Leaf count of result is larger than twice the leaf count of optimal. 134 vs. \(2 (34) = 68\).
Time = 0.23 (sec) , antiderivative size = 134, normalized size of antiderivative = 3.19 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=\begin {cases} \frac {- \frac {a^{2} c}{2 x^{2}} - b^{2} c \log {\left (x \right )}}{e^{3}} & \text {for}\: m = -3 \\\frac {a^{2} c \log {\left (x \right )} - \frac {b^{2} c x^{2}}{2}}{e} & \text {for}\: m = -1 \\\frac {a^{2} c m x \left (e x\right )^{m}}{m^{2} + 4 m + 3} + \frac {3 a^{2} c x \left (e x\right )^{m}}{m^{2} + 4 m + 3} - \frac {b^{2} c m x^{3} \left (e x\right )^{m}}{m^{2} + 4 m + 3} - \frac {b^{2} c x^{3} \left (e x\right )^{m}}{m^{2} + 4 m + 3} & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.98 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=-\frac {b^{2} c e^{m} x^{3} x^{m}}{m + 3} + \frac {\left (e x\right )^{m + 1} a^{2} c}{e {\left (m + 1\right )}} \]
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Time = 0.30 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.55 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=-\frac {\left (e x\right )^{m} b^{2} c m x^{3} + \left (e x\right )^{m} b^{2} c x^{3} - \left (e x\right )^{m} a^{2} c m x - 3 \, \left (e x\right )^{m} a^{2} c x}{m^{2} + 4 \, m + 3} \]
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Time = 0.36 (sec) , antiderivative size = 46, normalized size of antiderivative = 1.10 \[ \int (e x)^m (a+b x) (a c-b c x) \, dx=\frac {c\,x\,{\left (e\,x\right )}^m\,\left (a^2\,m+3\,a^2-b^2\,x^2-b^2\,m\,x^2\right )}{m^2+4\,m+3} \]
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