Integrand size = 11, antiderivative size = 43 \[ \int x^m (a+b x)^2 \, dx=\frac {a^2 x^{1+m}}{1+m}+\frac {2 a b x^{2+m}}{2+m}+\frac {b^2 x^{3+m}}{3+m} \]
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Time = 0.01 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {45} \[ \int x^m (a+b x)^2 \, dx=\frac {a^2 x^{m+1}}{m+1}+\frac {2 a b x^{m+2}}{m+2}+\frac {b^2 x^{m+3}}{m+3} \]
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Rule 45
Rubi steps \begin{align*} \text {integral}& = \int \left (a^2 x^m+2 a b x^{1+m}+b^2 x^{2+m}\right ) \, dx \\ & = \frac {a^2 x^{1+m}}{1+m}+\frac {2 a b x^{2+m}}{2+m}+\frac {b^2 x^{3+m}}{3+m} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 38, normalized size of antiderivative = 0.88 \[ \int x^m (a+b x)^2 \, dx=x^{1+m} \left (\frac {a^2}{1+m}+\frac {2 a b x}{2+m}+\frac {b^2 x^2}{3+m}\right ) \]
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Time = 0.06 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.19
method | result | size |
norman | \(\frac {a^{2} x \,{\mathrm e}^{m \ln \left (x \right )}}{1+m}+\frac {b^{2} x^{3} {\mathrm e}^{m \ln \left (x \right )}}{3+m}+\frac {2 a b \,x^{2} {\mathrm e}^{m \ln \left (x \right )}}{2+m}\) | \(51\) |
risch | \(\frac {x \left (b^{2} m^{2} x^{2}+2 a b \,m^{2} x +3 m \,x^{2} b^{2}+a^{2} m^{2}+8 m x a b +2 b^{2} x^{2}+5 m \,a^{2}+6 a b x +6 a^{2}\right ) x^{m}}{\left (3+m \right ) \left (2+m \right ) \left (1+m \right )}\) | \(86\) |
gosper | \(\frac {x^{1+m} \left (b^{2} m^{2} x^{2}+2 a b \,m^{2} x +3 m \,x^{2} b^{2}+a^{2} m^{2}+8 m x a b +2 b^{2} x^{2}+5 m \,a^{2}+6 a b x +6 a^{2}\right )}{\left (1+m \right ) \left (2+m \right ) \left (3+m \right )}\) | \(87\) |
parallelrisch | \(\frac {x^{3} x^{m} b^{2} m^{2}+3 x^{3} x^{m} b^{2} m +2 x^{2} x^{m} a b \,m^{2}+2 x^{3} x^{m} b^{2}+8 x^{2} x^{m} a b m +x \,x^{m} a^{2} m^{2}+6 x^{2} x^{m} a b +5 x \,x^{m} a^{2} m +6 x \,x^{m} a^{2}}{\left (3+m \right ) \left (2+m \right ) \left (1+m \right )}\) | \(118\) |
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Time = 0.22 (sec) , antiderivative size = 85, normalized size of antiderivative = 1.98 \[ \int x^m (a+b x)^2 \, dx=\frac {{\left ({\left (b^{2} m^{2} + 3 \, b^{2} m + 2 \, b^{2}\right )} x^{3} + 2 \, {\left (a b m^{2} + 4 \, a b m + 3 \, a b\right )} x^{2} + {\left (a^{2} m^{2} + 5 \, a^{2} m + 6 \, a^{2}\right )} x\right )} x^{m}}{m^{3} + 6 \, m^{2} + 11 \, m + 6} \]
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Leaf count of result is larger than twice the leaf count of optimal. 299 vs. \(2 (36) = 72\).
Time = 0.37 (sec) , antiderivative size = 299, normalized size of antiderivative = 6.95 \[ \int x^m (a+b x)^2 \, dx=\begin {cases} - \frac {a^{2}}{2 x^{2}} - \frac {2 a b}{x} + b^{2} \log {\left (x \right )} & \text {for}\: m = -3 \\- \frac {a^{2}}{x} + 2 a b \log {\left (x \right )} + b^{2} x & \text {for}\: m = -2 \\a^{2} \log {\left (x \right )} + 2 a b x + \frac {b^{2} x^{2}}{2} & \text {for}\: m = -1 \\\frac {a^{2} m^{2} x x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {5 a^{2} m x x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {6 a^{2} x x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {2 a b m^{2} x^{2} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {8 a b m x^{2} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {6 a b x^{2} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {b^{2} m^{2} x^{3} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {3 b^{2} m x^{3} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} + \frac {2 b^{2} x^{3} x^{m}}{m^{3} + 6 m^{2} + 11 m + 6} & \text {otherwise} \end {cases} \]
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Time = 0.20 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.00 \[ \int x^m (a+b x)^2 \, dx=\frac {b^{2} x^{m + 3}}{m + 3} + \frac {2 \, a b x^{m + 2}}{m + 2} + \frac {a^{2} x^{m + 1}}{m + 1} \]
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Leaf count of result is larger than twice the leaf count of optimal. 117 vs. \(2 (43) = 86\).
Time = 0.29 (sec) , antiderivative size = 117, normalized size of antiderivative = 2.72 \[ \int x^m (a+b x)^2 \, dx=\frac {b^{2} m^{2} x^{3} x^{m} + 2 \, a b m^{2} x^{2} x^{m} + 3 \, b^{2} m x^{3} x^{m} + a^{2} m^{2} x x^{m} + 8 \, a b m x^{2} x^{m} + 2 \, b^{2} x^{3} x^{m} + 5 \, a^{2} m x x^{m} + 6 \, a b x^{2} x^{m} + 6 \, a^{2} x x^{m}}{m^{3} + 6 \, m^{2} + 11 \, m + 6} \]
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Time = 0.47 (sec) , antiderivative size = 93, normalized size of antiderivative = 2.16 \[ \int x^m (a+b x)^2 \, dx=x^m\,\left (\frac {a^2\,x\,\left (m^2+5\,m+6\right )}{m^3+6\,m^2+11\,m+6}+\frac {b^2\,x^3\,\left (m^2+3\,m+2\right )}{m^3+6\,m^2+11\,m+6}+\frac {2\,a\,b\,x^2\,\left (m^2+4\,m+3\right )}{m^3+6\,m^2+11\,m+6}\right ) \]
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