Integrand size = 11, antiderivative size = 106 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {a^8 x^2}{2}+\frac {8}{5} a^7 b x^5+\frac {7}{2} a^6 b^2 x^8+\frac {56}{11} a^5 b^3 x^{11}+5 a^4 b^4 x^{14}+\frac {56}{17} a^3 b^5 x^{17}+\frac {7}{5} a^2 b^6 x^{20}+\frac {8}{23} a b^7 x^{23}+\frac {b^8 x^{26}}{26} \]
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Time = 0.03 (sec) , antiderivative size = 106, 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 = {276} \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {a^8 x^2}{2}+\frac {8}{5} a^7 b x^5+\frac {7}{2} a^6 b^2 x^8+\frac {56}{11} a^5 b^3 x^{11}+5 a^4 b^4 x^{14}+\frac {56}{17} a^3 b^5 x^{17}+\frac {7}{5} a^2 b^6 x^{20}+\frac {8}{23} a b^7 x^{23}+\frac {b^8 x^{26}}{26} \]
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Rule 276
Rubi steps \begin{align*} \text {integral}& = \int \left (a^8 x+8 a^7 b x^4+28 a^6 b^2 x^7+56 a^5 b^3 x^{10}+70 a^4 b^4 x^{13}+56 a^3 b^5 x^{16}+28 a^2 b^6 x^{19}+8 a b^7 x^{22}+b^8 x^{25}\right ) \, dx \\ & = \frac {a^8 x^2}{2}+\frac {8}{5} a^7 b x^5+\frac {7}{2} a^6 b^2 x^8+\frac {56}{11} a^5 b^3 x^{11}+5 a^4 b^4 x^{14}+\frac {56}{17} a^3 b^5 x^{17}+\frac {7}{5} a^2 b^6 x^{20}+\frac {8}{23} a b^7 x^{23}+\frac {b^8 x^{26}}{26} \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 106, normalized size of antiderivative = 1.00 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {a^8 x^2}{2}+\frac {8}{5} a^7 b x^5+\frac {7}{2} a^6 b^2 x^8+\frac {56}{11} a^5 b^3 x^{11}+5 a^4 b^4 x^{14}+\frac {56}{17} a^3 b^5 x^{17}+\frac {7}{5} a^2 b^6 x^{20}+\frac {8}{23} a b^7 x^{23}+\frac {b^8 x^{26}}{26} \]
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Time = 3.65 (sec) , antiderivative size = 91, normalized size of antiderivative = 0.86
method | result | size |
gosper | \(\frac {1}{2} a^{8} x^{2}+\frac {8}{5} x^{5} b \,a^{7}+\frac {7}{2} a^{6} b^{2} x^{8}+\frac {56}{11} x^{11} b^{3} a^{5}+5 a^{4} b^{4} x^{14}+\frac {56}{17} a^{3} b^{5} x^{17}+\frac {7}{5} a^{2} b^{6} x^{20}+\frac {8}{23} a \,b^{7} x^{23}+\frac {1}{26} b^{8} x^{26}\) | \(91\) |
default | \(\frac {1}{2} a^{8} x^{2}+\frac {8}{5} x^{5} b \,a^{7}+\frac {7}{2} a^{6} b^{2} x^{8}+\frac {56}{11} x^{11} b^{3} a^{5}+5 a^{4} b^{4} x^{14}+\frac {56}{17} a^{3} b^{5} x^{17}+\frac {7}{5} a^{2} b^{6} x^{20}+\frac {8}{23} a \,b^{7} x^{23}+\frac {1}{26} b^{8} x^{26}\) | \(91\) |
norman | \(\frac {1}{2} a^{8} x^{2}+\frac {8}{5} x^{5} b \,a^{7}+\frac {7}{2} a^{6} b^{2} x^{8}+\frac {56}{11} x^{11} b^{3} a^{5}+5 a^{4} b^{4} x^{14}+\frac {56}{17} a^{3} b^{5} x^{17}+\frac {7}{5} a^{2} b^{6} x^{20}+\frac {8}{23} a \,b^{7} x^{23}+\frac {1}{26} b^{8} x^{26}\) | \(91\) |
risch | \(\frac {1}{2} a^{8} x^{2}+\frac {8}{5} x^{5} b \,a^{7}+\frac {7}{2} a^{6} b^{2} x^{8}+\frac {56}{11} x^{11} b^{3} a^{5}+5 a^{4} b^{4} x^{14}+\frac {56}{17} a^{3} b^{5} x^{17}+\frac {7}{5} a^{2} b^{6} x^{20}+\frac {8}{23} a \,b^{7} x^{23}+\frac {1}{26} b^{8} x^{26}\) | \(91\) |
parallelrisch | \(\frac {1}{2} a^{8} x^{2}+\frac {8}{5} x^{5} b \,a^{7}+\frac {7}{2} a^{6} b^{2} x^{8}+\frac {56}{11} x^{11} b^{3} a^{5}+5 a^{4} b^{4} x^{14}+\frac {56}{17} a^{3} b^{5} x^{17}+\frac {7}{5} a^{2} b^{6} x^{20}+\frac {8}{23} a \,b^{7} x^{23}+\frac {1}{26} b^{8} x^{26}\) | \(91\) |
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Time = 0.26 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.85 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {1}{26} \, b^{8} x^{26} + \frac {8}{23} \, a b^{7} x^{23} + \frac {7}{5} \, a^{2} b^{6} x^{20} + \frac {56}{17} \, a^{3} b^{5} x^{17} + 5 \, a^{4} b^{4} x^{14} + \frac {56}{11} \, a^{5} b^{3} x^{11} + \frac {7}{2} \, a^{6} b^{2} x^{8} + \frac {8}{5} \, a^{7} b x^{5} + \frac {1}{2} \, a^{8} x^{2} \]
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Time = 0.02 (sec) , antiderivative size = 105, normalized size of antiderivative = 0.99 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {a^{8} x^{2}}{2} + \frac {8 a^{7} b x^{5}}{5} + \frac {7 a^{6} b^{2} x^{8}}{2} + \frac {56 a^{5} b^{3} x^{11}}{11} + 5 a^{4} b^{4} x^{14} + \frac {56 a^{3} b^{5} x^{17}}{17} + \frac {7 a^{2} b^{6} x^{20}}{5} + \frac {8 a b^{7} x^{23}}{23} + \frac {b^{8} x^{26}}{26} \]
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Time = 0.32 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.85 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {1}{26} \, b^{8} x^{26} + \frac {8}{23} \, a b^{7} x^{23} + \frac {7}{5} \, a^{2} b^{6} x^{20} + \frac {56}{17} \, a^{3} b^{5} x^{17} + 5 \, a^{4} b^{4} x^{14} + \frac {56}{11} \, a^{5} b^{3} x^{11} + \frac {7}{2} \, a^{6} b^{2} x^{8} + \frac {8}{5} \, a^{7} b x^{5} + \frac {1}{2} \, a^{8} x^{2} \]
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Time = 0.27 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.85 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {1}{26} \, b^{8} x^{26} + \frac {8}{23} \, a b^{7} x^{23} + \frac {7}{5} \, a^{2} b^{6} x^{20} + \frac {56}{17} \, a^{3} b^{5} x^{17} + 5 \, a^{4} b^{4} x^{14} + \frac {56}{11} \, a^{5} b^{3} x^{11} + \frac {7}{2} \, a^{6} b^{2} x^{8} + \frac {8}{5} \, a^{7} b x^{5} + \frac {1}{2} \, a^{8} x^{2} \]
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Time = 0.06 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.85 \[ \int x \left (a+b x^3\right )^8 \, dx=\frac {a^8\,x^2}{2}+\frac {8\,a^7\,b\,x^5}{5}+\frac {7\,a^6\,b^2\,x^8}{2}+\frac {56\,a^5\,b^3\,x^{11}}{11}+5\,a^4\,b^4\,x^{14}+\frac {56\,a^3\,b^5\,x^{17}}{17}+\frac {7\,a^2\,b^6\,x^{20}}{5}+\frac {8\,a\,b^7\,x^{23}}{23}+\frac {b^8\,x^{26}}{26} \]
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