Integrand size = 28, antiderivative size = 64 \[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\frac {x^3 \left (a+b x^n\right ) \operatorname {Hypergeometric2F1}\left (3,\frac {3}{n},\frac {3+n}{n},-\frac {b x^n}{a}\right )}{3 a^3 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \]
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Time = 0.02 (sec) , antiderivative size = 64, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.071, Rules used = {1369, 371} \[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\frac {x^3 \left (a+b x^n\right ) \operatorname {Hypergeometric2F1}\left (3,\frac {3}{n},\frac {n+3}{n},-\frac {b x^n}{a}\right )}{3 a^3 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \]
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Rule 371
Rule 1369
Rubi steps \begin{align*} \text {integral}& = \frac {\left (b^2 \left (a b+b^2 x^n\right )\right ) \int \frac {x^2}{\left (a b+b^2 x^n\right )^3} \, dx}{\sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ & = \frac {x^3 \left (a+b x^n\right ) \, _2F_1\left (3,\frac {3}{n};\frac {3+n}{n};-\frac {b x^n}{a}\right )}{3 a^3 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 55, normalized size of antiderivative = 0.86 \[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\frac {x^3 \left (a+b x^n\right )^3 \operatorname {Hypergeometric2F1}\left (3,\frac {3}{n},1+\frac {3}{n},-\frac {b x^n}{a}\right )}{3 a^3 \left (\left (a+b x^n\right )^2\right )^{3/2}} \]
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\[\int \frac {x^{2}}{\left (a^{2}+2 a b \,x^{n}+b^{2} x^{2 n}\right )^{\frac {3}{2}}}d x\]
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\[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\int { \frac {x^{2}}{{\left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2}\right )}^{\frac {3}{2}}} \,d x } \]
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\[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\int \frac {x^{2}}{\left (\left (a + b x^{n}\right )^{2}\right )^{\frac {3}{2}}}\, dx \]
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\[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\int { \frac {x^{2}}{{\left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2}\right )}^{\frac {3}{2}}} \,d x } \]
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\[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\int { \frac {x^{2}}{{\left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2}\right )}^{\frac {3}{2}}} \,d x } \]
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Timed out. \[ \int \frac {x^2}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{3/2}} \, dx=\int \frac {x^2}{{\left (a^2+b^2\,x^{2\,n}+2\,a\,b\,x^n\right )}^{3/2}} \,d x \]
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