Integrand size = 24, antiderivative size = 151 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {a^3 x^6 \sqrt {a^2+2 a b x+b^2 x^2}}{6 (a+b x)}+\frac {3 a^2 b x^7 \sqrt {a^2+2 a b x+b^2 x^2}}{7 (a+b x)}+\frac {3 a b^2 x^8 \sqrt {a^2+2 a b x+b^2 x^2}}{8 (a+b x)}+\frac {b^3 x^9 \sqrt {a^2+2 a b x+b^2 x^2}}{9 (a+b x)} \]
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Time = 0.03 (sec) , antiderivative size = 151, 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} \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {3 a b^2 x^8 \sqrt {a^2+2 a b x+b^2 x^2}}{8 (a+b x)}+\frac {3 a^2 b x^7 \sqrt {a^2+2 a b x+b^2 x^2}}{7 (a+b x)}+\frac {b^3 x^9 \sqrt {a^2+2 a b x+b^2 x^2}}{9 (a+b x)}+\frac {a^3 x^6 \sqrt {a^2+2 a b x+b^2 x^2}}{6 (a+b x)} \]
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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^5 \left (a b+b^2 x\right )^3 \, dx}{b^2 \left (a b+b^2 x\right )} \\ & = \frac {\sqrt {a^2+2 a b x+b^2 x^2} \int \left (a^3 b^3 x^5+3 a^2 b^4 x^6+3 a b^5 x^7+b^6 x^8\right ) \, dx}{b^2 \left (a b+b^2 x\right )} \\ & = \frac {a^3 x^6 \sqrt {a^2+2 a b x+b^2 x^2}}{6 (a+b x)}+\frac {3 a^2 b x^7 \sqrt {a^2+2 a b x+b^2 x^2}}{7 (a+b x)}+\frac {3 a b^2 x^8 \sqrt {a^2+2 a b x+b^2 x^2}}{8 (a+b x)}+\frac {b^3 x^9 \sqrt {a^2+2 a b x+b^2 x^2}}{9 (a+b x)} \\ \end{align*}
Time = 0.99 (sec) , antiderivative size = 103, normalized size of antiderivative = 0.68 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {x^6 \left (84 a^3+216 a^2 b x+189 a b^2 x^2+56 b^3 x^3\right ) \left (\sqrt {a^2} b x+a \left (\sqrt {a^2}-\sqrt {(a+b x)^2}\right )\right )}{504 \left (-a^2-a b x+\sqrt {a^2} \sqrt {(a+b x)^2}\right )} \]
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Time = 2.54 (sec) , antiderivative size = 52, normalized size of antiderivative = 0.34
method | result | size |
gosper | \(\frac {x^{6} \left (56 b^{3} x^{3}+189 a \,b^{2} x^{2}+216 a^{2} b x +84 a^{3}\right ) \left (\left (b x +a \right )^{2}\right )^{\frac {3}{2}}}{504 \left (b x +a \right )^{3}}\) | \(52\) |
default | \(\frac {x^{6} \left (56 b^{3} x^{3}+189 a \,b^{2} x^{2}+216 a^{2} b x +84 a^{3}\right ) \left (\left (b x +a \right )^{2}\right )^{\frac {3}{2}}}{504 \left (b x +a \right )^{3}}\) | \(52\) |
risch | \(\frac {a^{3} x^{6} \sqrt {\left (b x +a \right )^{2}}}{6 b x +6 a}+\frac {3 a^{2} b \,x^{7} \sqrt {\left (b x +a \right )^{2}}}{7 \left (b x +a \right )}+\frac {3 a \,b^{2} x^{8} \sqrt {\left (b x +a \right )^{2}}}{8 \left (b x +a \right )}+\frac {b^{3} x^{9} \sqrt {\left (b x +a \right )^{2}}}{9 b x +9 a}\) | \(100\) |
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Time = 0.22 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.23 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {1}{9} \, b^{3} x^{9} + \frac {3}{8} \, a b^{2} x^{8} + \frac {3}{7} \, a^{2} b x^{7} + \frac {1}{6} \, a^{3} x^{6} \]
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Leaf count of result is larger than twice the leaf count of optimal. 250 vs. \(2 (107) = 214\).
Time = 0.65 (sec) , antiderivative size = 250, normalized size of antiderivative = 1.66 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\begin {cases} \sqrt {a^{2} + 2 a b x + b^{2} x^{2}} \left (- \frac {a^{8}}{504 b^{6}} + \frac {a^{7} x}{504 b^{5}} - \frac {a^{6} x^{2}}{504 b^{4}} + \frac {a^{5} x^{3}}{504 b^{3}} - \frac {a^{4} x^{4}}{504 b^{2}} + \frac {a^{3} x^{5}}{504 b} + \frac {83 a^{2} x^{6}}{504} + \frac {19 a b x^{7}}{72} + \frac {b^{2} x^{8}}{9}\right ) & \text {for}\: b^{2} \neq 0 \\\frac {- \frac {a^{10} \left (a^{2} + 2 a b x\right )^{\frac {5}{2}}}{5} + \frac {5 a^{8} \left (a^{2} + 2 a b x\right )^{\frac {7}{2}}}{7} - \frac {10 a^{6} \left (a^{2} + 2 a b x\right )^{\frac {9}{2}}}{9} + \frac {10 a^{4} \left (a^{2} + 2 a b x\right )^{\frac {11}{2}}}{11} - \frac {5 a^{2} \left (a^{2} + 2 a b x\right )^{\frac {13}{2}}}{13} + \frac {\left (a^{2} + 2 a b x\right )^{\frac {15}{2}}}{15}}{32 a^{6} b^{6}} & \text {for}\: a b \neq 0 \\\frac {x^{6} \left (a^{2}\right )^{\frac {3}{2}}}{6} & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 189, normalized size of antiderivative = 1.25 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} x^{4}}{9 \, b^{2}} - \frac {13 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a x^{3}}{72 \, b^{3}} - \frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {3}{2}} a^{5} x}{4 \, b^{5}} + \frac {37 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a^{2} x^{2}}{168 \, b^{4}} - \frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {3}{2}} a^{6}}{4 \, b^{6}} - \frac {121 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a^{3} x}{504 \, b^{5}} + \frac {125 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}^{\frac {5}{2}} a^{4}}{504 \, b^{6}} \]
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Time = 0.27 (sec) , antiderivative size = 73, normalized size of antiderivative = 0.48 \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\frac {1}{9} \, b^{3} x^{9} \mathrm {sgn}\left (b x + a\right ) + \frac {3}{8} \, a b^{2} x^{8} \mathrm {sgn}\left (b x + a\right ) + \frac {3}{7} \, a^{2} b x^{7} \mathrm {sgn}\left (b x + a\right ) + \frac {1}{6} \, a^{3} x^{6} \mathrm {sgn}\left (b x + a\right ) - \frac {a^{9} \mathrm {sgn}\left (b x + a\right )}{504 \, b^{6}} \]
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Timed out. \[ \int x^5 \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx=\int x^5\,{\left (a^2+2\,a\,b\,x+b^2\,x^2\right )}^{3/2} \,d x \]
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