Integrand size = 22, antiderivative size = 79 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {(b c-a d)^2 x^2}{2 d^3}-\frac {b (b c-2 a d) x^4}{4 d^2}+\frac {b^2 x^6}{6 d}-\frac {c (b c-a d)^2 \log \left (c+d x^2\right )}{2 d^4} \]
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Time = 0.08 (sec) , antiderivative size = 79, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {457, 78} \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=-\frac {c (b c-a d)^2 \log \left (c+d x^2\right )}{2 d^4}+\frac {x^2 (b c-a d)^2}{2 d^3}-\frac {b x^4 (b c-2 a d)}{4 d^2}+\frac {b^2 x^6}{6 d} \]
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Rule 78
Rule 457
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {x (a+b x)^2}{c+d x} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {(-b c+a d)^2}{d^3}-\frac {b (b c-2 a d) x}{d^2}+\frac {b^2 x^2}{d}-\frac {c (b c-a d)^2}{d^3 (c+d x)}\right ) \, dx,x,x^2\right ) \\ & = \frac {(b c-a d)^2 x^2}{2 d^3}-\frac {b (b c-2 a d) x^4}{4 d^2}+\frac {b^2 x^6}{6 d}-\frac {c (b c-a d)^2 \log \left (c+d x^2\right )}{2 d^4} \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 82, normalized size of antiderivative = 1.04 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {d x^2 \left (6 a^2 d^2+6 a b d \left (-2 c+d x^2\right )+b^2 \left (6 c^2-3 c d x^2+2 d^2 x^4\right )\right )-6 c (b c-a d)^2 \log \left (c+d x^2\right )}{12 d^4} \]
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Time = 2.61 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.20
method | result | size |
norman | \(\frac {b^{2} x^{6}}{6 d}+\frac {\left (a^{2} d^{2}-2 a b c d +b^{2} c^{2}\right ) x^{2}}{2 d^{3}}+\frac {b \left (2 a d -b c \right ) x^{4}}{4 d^{2}}-\frac {c \left (a^{2} d^{2}-2 a b c d +b^{2} c^{2}\right ) \ln \left (d \,x^{2}+c \right )}{2 d^{4}}\) | \(95\) |
default | \(\frac {\frac {1}{3} b^{2} d^{2} x^{6}+x^{4} a b \,d^{2}-\frac {1}{2} x^{4} b^{2} c d +a^{2} d^{2} x^{2}-2 a b c d \,x^{2}+b^{2} c^{2} x^{2}}{2 d^{3}}-\frac {c \left (a^{2} d^{2}-2 a b c d +b^{2} c^{2}\right ) \ln \left (d \,x^{2}+c \right )}{2 d^{4}}\) | \(102\) |
parallelrisch | \(-\frac {-2 b^{2} d^{3} x^{6}-6 x^{4} a b \,d^{3}+3 x^{4} b^{2} c \,d^{2}-6 x^{2} a^{2} d^{3}+12 x^{2} a b c \,d^{2}-6 x^{2} b^{2} c^{2} d +6 \ln \left (d \,x^{2}+c \right ) a^{2} c \,d^{2}-12 \ln \left (d \,x^{2}+c \right ) a b \,c^{2} d +6 \ln \left (d \,x^{2}+c \right ) b^{2} c^{3}}{12 d^{4}}\) | \(123\) |
risch | \(\frac {b^{2} x^{6}}{6 d}+\frac {x^{4} a b}{2 d}-\frac {x^{4} b^{2} c}{4 d^{2}}+\frac {a^{2} x^{2}}{2 d}-\frac {a b c \,x^{2}}{d^{2}}+\frac {b^{2} c^{2} x^{2}}{2 d^{3}}-\frac {c \ln \left (d \,x^{2}+c \right ) a^{2}}{2 d^{2}}+\frac {c^{2} \ln \left (d \,x^{2}+c \right ) a b}{d^{3}}-\frac {c^{3} \ln \left (d \,x^{2}+c \right ) b^{2}}{2 d^{4}}\) | \(124\) |
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Time = 0.26 (sec) , antiderivative size = 101, normalized size of antiderivative = 1.28 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {2 \, b^{2} d^{3} x^{6} - 3 \, {\left (b^{2} c d^{2} - 2 \, a b d^{3}\right )} x^{4} + 6 \, {\left (b^{2} c^{2} d - 2 \, a b c d^{2} + a^{2} d^{3}\right )} x^{2} - 6 \, {\left (b^{2} c^{3} - 2 \, a b c^{2} d + a^{2} c d^{2}\right )} \log \left (d x^{2} + c\right )}{12 \, d^{4}} \]
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Time = 0.23 (sec) , antiderivative size = 83, normalized size of antiderivative = 1.05 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {b^{2} x^{6}}{6 d} - \frac {c \left (a d - b c\right )^{2} \log {\left (c + d x^{2} \right )}}{2 d^{4}} + x^{4} \left (\frac {a b}{2 d} - \frac {b^{2} c}{4 d^{2}}\right ) + x^{2} \left (\frac {a^{2}}{2 d} - \frac {a b c}{d^{2}} + \frac {b^{2} c^{2}}{2 d^{3}}\right ) \]
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Time = 0.19 (sec) , antiderivative size = 100, normalized size of antiderivative = 1.27 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {2 \, b^{2} d^{2} x^{6} - 3 \, {\left (b^{2} c d - 2 \, a b d^{2}\right )} x^{4} + 6 \, {\left (b^{2} c^{2} - 2 \, a b c d + a^{2} d^{2}\right )} x^{2}}{12 \, d^{3}} - \frac {{\left (b^{2} c^{3} - 2 \, a b c^{2} d + a^{2} c d^{2}\right )} \log \left (d x^{2} + c\right )}{2 \, d^{4}} \]
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Time = 0.29 (sec) , antiderivative size = 107, normalized size of antiderivative = 1.35 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=\frac {2 \, b^{2} d^{2} x^{6} - 3 \, b^{2} c d x^{4} + 6 \, a b d^{2} x^{4} + 6 \, b^{2} c^{2} x^{2} - 12 \, a b c d x^{2} + 6 \, a^{2} d^{2} x^{2}}{12 \, d^{3}} - \frac {{\left (b^{2} c^{3} - 2 \, a b c^{2} d + a^{2} c d^{2}\right )} \log \left ({\left | d x^{2} + c \right |}\right )}{2 \, d^{4}} \]
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Time = 0.06 (sec) , antiderivative size = 106, normalized size of antiderivative = 1.34 \[ \int \frac {x^3 \left (a+b x^2\right )^2}{c+d x^2} \, dx=x^2\,\left (\frac {a^2}{2\,d}+\frac {c\,\left (\frac {b^2\,c}{d^2}-\frac {2\,a\,b}{d}\right )}{2\,d}\right )-x^4\,\left (\frac {b^2\,c}{4\,d^2}-\frac {a\,b}{2\,d}\right )+\frac {b^2\,x^6}{6\,d}-\frac {\ln \left (d\,x^2+c\right )\,\left (a^2\,c\,d^2-2\,a\,b\,c^2\,d+b^2\,c^3\right )}{2\,d^4} \]
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