Optimal. Leaf size=65 \[ \frac{3 a^2 b x^{n+4}}{n+4}+\frac{a^3 x^4}{4}+\frac{3 a b^2 x^{2 (n+2)}}{2 (n+2)}+\frac{b^3 x^{3 n+4}}{3 n+4} \]
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Rubi [A] time = 0.0315563, antiderivative size = 65, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.077, Rules used = {270} \[ \frac{3 a^2 b x^{n+4}}{n+4}+\frac{a^3 x^4}{4}+\frac{3 a b^2 x^{2 (n+2)}}{2 (n+2)}+\frac{b^3 x^{3 n+4}}{3 n+4} \]
Antiderivative was successfully verified.
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Rule 270
Rubi steps
\begin{align*} \int x^3 \left (a+b x^n\right )^3 \, dx &=\int \left (a^3 x^3+b^3 x^{3 (1+n)}+3 a^2 b x^{3+n}+3 a b^2 x^{3+2 n}\right ) \, dx\\ &=\frac{a^3 x^4}{4}+\frac{3 a b^2 x^{2 (2+n)}}{2 (2+n)}+\frac{3 a^2 b x^{4+n}}{4+n}+\frac{b^3 x^{4+3 n}}{4+3 n}\\ \end{align*}
Mathematica [A] time = 0.0402591, size = 58, normalized size = 0.89 \[ \frac{1}{4} x^4 \left (\frac{12 a^2 b x^n}{n+4}+a^3+\frac{6 a b^2 x^{2 n}}{n+2}+\frac{4 b^3 x^{3 n}}{3 n+4}\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.01, size = 65, normalized size = 1. \begin{align*}{\frac{{a}^{3}{x}^{4}}{4}}+{\frac{{b}^{3}{x}^{4} \left ({x}^{n} \right ) ^{3}}{4+3\,n}}+{\frac{3\,a{b}^{2}{x}^{4} \left ({x}^{n} \right ) ^{2}}{4+2\,n}}+3\,{\frac{{a}^{2}b{x}^{4}{x}^{n}}{4+n}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 1.0637, size = 315, normalized size = 4.85 \begin{align*} \frac{4 \,{\left (b^{3} n^{2} + 6 \, b^{3} n + 8 \, b^{3}\right )} x^{4} x^{3 \, n} + 6 \,{\left (3 \, a b^{2} n^{2} + 16 \, a b^{2} n + 16 \, a b^{2}\right )} x^{4} x^{2 \, n} + 12 \,{\left (3 \, a^{2} b n^{2} + 10 \, a^{2} b n + 8 \, a^{2} b\right )} x^{4} x^{n} +{\left (3 \, a^{3} n^{3} + 22 \, a^{3} n^{2} + 48 \, a^{3} n + 32 \, a^{3}\right )} x^{4}}{4 \,{\left (3 \, n^{3} + 22 \, n^{2} + 48 \, n + 32\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 14.8165, size = 507, normalized size = 7.8 \begin{align*} \begin{cases} \frac{a^{3} x^{4}}{4} + 3 a^{2} b \log{\left (x \right )} - \frac{3 a b^{2}}{4 x^{4}} - \frac{b^{3}}{8 x^{8}} & \text{for}\: n = -4 \\\frac{a^{3} x^{4}}{4} + \frac{3 a^{2} b x^{2}}{2} + 3 a b^{2} \log{\left (x \right )} - \frac{b^{3}}{2 x^{2}} & \text{for}\: n = -2 \\\frac{a^{3} x^{4}}{4} + \frac{9 a^{2} b x^{\frac{8}{3}}}{8} + \frac{9 a b^{2} x^{\frac{4}{3}}}{4} + b^{3} \log{\left (x \right )} & \text{for}\: n = - \frac{4}{3} \\\frac{3 a^{3} n^{3} x^{4}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{22 a^{3} n^{2} x^{4}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{48 a^{3} n x^{4}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{32 a^{3} x^{4}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{36 a^{2} b n^{2} x^{4} x^{n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{120 a^{2} b n x^{4} x^{n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{96 a^{2} b x^{4} x^{n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{18 a b^{2} n^{2} x^{4} x^{2 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{96 a b^{2} n x^{4} x^{2 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{96 a b^{2} x^{4} x^{2 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{4 b^{3} n^{2} x^{4} x^{3 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{24 b^{3} n x^{4} x^{3 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} + \frac{32 b^{3} x^{4} x^{3 n}}{12 n^{3} + 88 n^{2} + 192 n + 128} & \text{otherwise} \end{cases} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] time = 1.19445, size = 254, normalized size = 3.91 \begin{align*} \frac{4 \, b^{3} n^{2} x^{4} x^{3 \, n} + 18 \, a b^{2} n^{2} x^{4} x^{2 \, n} + 36 \, a^{2} b n^{2} x^{4} x^{n} + 3 \, a^{3} n^{3} x^{4} + 24 \, b^{3} n x^{4} x^{3 \, n} + 96 \, a b^{2} n x^{4} x^{2 \, n} + 120 \, a^{2} b n x^{4} x^{n} + 22 \, a^{3} n^{2} x^{4} + 32 \, b^{3} x^{4} x^{3 \, n} + 96 \, a b^{2} x^{4} x^{2 \, n} + 96 \, a^{2} b x^{4} x^{n} + 48 \, a^{3} n x^{4} + 32 \, a^{3} x^{4}}{4 \,{\left (3 \, n^{3} + 22 \, n^{2} + 48 \, n + 32\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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