Integrand size = 24, antiderivative size = 107 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {a^2 (a+b x)^5 \sqrt {a^2+2 a b x+b^2 x^2}}{6 b^3}-\frac {2 a (a+b x)^6 \sqrt {a^2+2 a b x+b^2 x^2}}{7 b^3}+\frac {(a+b x)^7 \sqrt {a^2+2 a b x+b^2 x^2}}{8 b^3} \]
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Time = 0.03 (sec) , antiderivative size = 107, 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} \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {\sqrt {a^2+2 a b x+b^2 x^2} (a+b x)^7}{8 b^3}-\frac {2 a \sqrt {a^2+2 a b x+b^2 x^2} (a+b x)^6}{7 b^3}+\frac {a^2 \sqrt {a^2+2 a b x+b^2 x^2} (a+b x)^5}{6 b^3} \]
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Rule 45
Rule 660
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt {a^2+2 a b x+b^2 x^2} \int x^2 \left (a b+b^2 x\right )^5 \, dx}{b^4 \left (a b+b^2 x\right )} \\ & = \frac {\sqrt {a^2+2 a b x+b^2 x^2} \int \left (\frac {a^2 \left (a b+b^2 x\right )^5}{b^2}-\frac {2 a \left (a b+b^2 x\right )^6}{b^3}+\frac {\left (a b+b^2 x\right )^7}{b^4}\right ) \, dx}{b^4 \left (a b+b^2 x\right )} \\ & = \frac {a^2 (a+b x)^5 \sqrt {a^2+2 a b x+b^2 x^2}}{6 b^3}-\frac {2 a (a+b x)^6 \sqrt {a^2+2 a b x+b^2 x^2}}{7 b^3}+\frac {(a+b x)^7 \sqrt {a^2+2 a b x+b^2 x^2}}{8 b^3} \\ \end{align*}
Time = 1.03 (sec) , antiderivative size = 77, normalized size of antiderivative = 0.72 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {x^3 \sqrt {(a+b x)^2} \left (56 a^5+210 a^4 b x+336 a^3 b^2 x^2+280 a^2 b^3 x^3+120 a b^4 x^4+21 b^5 x^5\right )}{168 (a+b x)} \]
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Time = 2.02 (sec) , antiderivative size = 74, normalized size of antiderivative = 0.69
method | result | size |
gosper | \(\frac {x^{3} \left (21 b^{5} x^{5}+120 a \,b^{4} x^{4}+280 a^{2} b^{3} x^{3}+336 a^{3} b^{2} x^{2}+210 a^{4} b x +56 a^{5}\right ) \left (\left (b x +a \right )^{2}\right )^{\frac {5}{2}}}{168 \left (b x +a \right )^{5}}\) | \(74\) |
default | \(\frac {x^{3} \left (21 b^{5} x^{5}+120 a \,b^{4} x^{4}+280 a^{2} b^{3} x^{3}+336 a^{3} b^{2} x^{2}+210 a^{4} b x +56 a^{5}\right ) \left (\left (b x +a \right )^{2}\right )^{\frac {5}{2}}}{168 \left (b x +a \right )^{5}}\) | \(74\) |
risch | \(\frac {\sqrt {\left (b x +a \right )^{2}}\, b^{5} x^{8}}{8 b x +8 a}+\frac {5 \sqrt {\left (b x +a \right )^{2}}\, a \,b^{4} x^{7}}{7 \left (b x +a \right )}+\frac {5 \sqrt {\left (b x +a \right )^{2}}\, a^{2} b^{3} x^{6}}{3 \left (b x +a \right )}+\frac {2 \sqrt {\left (b x +a \right )^{2}}\, a^{3} b^{2} x^{5}}{b x +a}+\frac {5 \sqrt {\left (b x +a \right )^{2}}\, a^{4} b \,x^{4}}{4 \left (b x +a \right )}+\frac {\sqrt {\left (b x +a \right )^{2}}\, a^{5} x^{3}}{3 b x +3 a}\) | \(154\) |
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Time = 0.25 (sec) , antiderivative size = 57, normalized size of antiderivative = 0.53 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {1}{8} \, b^{5} x^{8} + \frac {5}{7} \, a b^{4} x^{7} + \frac {5}{3} \, a^{2} b^{3} x^{6} + 2 \, a^{3} b^{2} x^{5} + \frac {5}{4} \, a^{4} b x^{4} + \frac {1}{3} \, a^{5} x^{3} \]
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Leaf count of result is larger than twice the leaf count of optimal. 180 vs. \(2 (71) = 142\).
Time = 0.68 (sec) , antiderivative size = 180, normalized size of antiderivative = 1.68 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\begin {cases} \sqrt {a^{2} + 2 a b x + b^{2} x^{2}} \left (\frac {a^{7}}{168 b^{3}} - \frac {a^{6} x}{168 b^{2}} + \frac {a^{5} x^{2}}{168 b} + \frac {55 a^{4} x^{3}}{168} + \frac {155 a^{3} b x^{4}}{168} + \frac {181 a^{2} b^{2} x^{5}}{168} + \frac {33 a b^{3} x^{6}}{56} + \frac {b^{4} x^{7}}{8}\right ) & \text {for}\: b^{2} \neq 0 \\\frac {\frac {a^{4} \left (a^{2} + 2 a b x\right )^{\frac {7}{2}}}{7} - \frac {2 a^{2} \left (a^{2} + 2 a b x\right )^{\frac {9}{2}}}{9} + \frac {\left (a^{2} + 2 a b x\right )^{\frac {11}{2}}}{11}}{4 a^{3} b^{3}} & \text {for}\: a b \neq 0 \\\frac {x^{3} \left (a^{2}\right )^{\frac {5}{2}}}{3} & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 102, normalized size of antiderivative = 0.95 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a^{2} x}{6 \, b^{2}} + \frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a^{3}}{6 \, b^{3}} + \frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {7}{2}} x}{8 \, b^{2}} - \frac {9 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {7}{2}} a}{56 \, b^{3}} \]
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Time = 0.28 (sec) , antiderivative size = 107, normalized size of antiderivative = 1.00 \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\frac {1}{8} \, b^{5} x^{8} \mathrm {sgn}\left (b x + a\right ) + \frac {5}{7} \, a b^{4} x^{7} \mathrm {sgn}\left (b x + a\right ) + \frac {5}{3} \, a^{2} b^{3} x^{6} \mathrm {sgn}\left (b x + a\right ) + 2 \, a^{3} b^{2} x^{5} \mathrm {sgn}\left (b x + a\right ) + \frac {5}{4} \, a^{4} b x^{4} \mathrm {sgn}\left (b x + a\right ) + \frac {1}{3} \, a^{5} x^{3} \mathrm {sgn}\left (b x + a\right ) + \frac {a^{8} \mathrm {sgn}\left (b x + a\right )}{168 \, b^{3}} \]
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Timed out. \[ \int x^2 \left (a^2+2 a b x+b^2 x^2\right )^{5/2} \, dx=\int x^2\,{\left (a^2+2\,a\,b\,x+b^2\,x^2\right )}^{5/2} \,d x \]
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