Integrand size = 20, antiderivative size = 109 \[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=-\frac {\sqrt [3]{1-x^3} \arctan \left (\frac {1-\frac {2 x}{\sqrt [3]{1-x^3}}}{\sqrt {3}}\right )}{\sqrt {3} \sqrt [3]{1-x} \sqrt [3]{1+x+x^2}}+\frac {\sqrt [3]{1-x^3} \log \left (x+\sqrt [3]{1-x^3}\right )}{2 \sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \]
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Time = 0.01 (sec) , antiderivative size = 109, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.100, Rules used = {727, 245} \[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=\frac {\sqrt [3]{1-x^3} \log \left (\sqrt [3]{1-x^3}+x\right )}{2 \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}}-\frac {\sqrt [3]{1-x^3} \arctan \left (\frac {1-\frac {2 x}{\sqrt [3]{1-x^3}}}{\sqrt {3}}\right )}{\sqrt {3} \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}} \]
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Rule 245
Rule 727
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt [3]{1-x^3} \int \frac {1}{\sqrt [3]{1-x^3}} \, dx}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \\ & = -\frac {\sqrt [3]{1-x^3} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{1-x^3}}}{\sqrt {3}}\right )}{\sqrt {3} \sqrt [3]{1-x} \sqrt [3]{1+x+x^2}}+\frac {\sqrt [3]{1-x^3} \log \left (x+\sqrt [3]{1-x^3}\right )}{2 \sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \\ \end{align*}
Result contains higher order function than in optimal. Order 6 vs. order 3 in optimal.
Time = 10.05 (sec) , antiderivative size = 132, normalized size of antiderivative = 1.21 \[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=-\frac {3 (1-x)^{2/3} \sqrt [3]{\frac {-i+\sqrt {3}-2 i x}{-3 i+\sqrt {3}}} \sqrt [3]{\frac {i+\sqrt {3}+2 i x}{3 i+\sqrt {3}}} \operatorname {AppellF1}\left (\frac {2}{3},\frac {1}{3},\frac {1}{3},\frac {5}{3},-\frac {2 i (-1+x)}{3 i+\sqrt {3}},\frac {2 i (-1+x)}{-3 i+\sqrt {3}}\right )}{2 \sqrt [3]{1+x+x^2}} \]
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\[\int \frac {1}{\left (1-x \right )^{\frac {1}{3}} \left (x^{2}+x +1\right )^{\frac {1}{3}}}d x\]
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none
Time = 0.40 (sec) , antiderivative size = 115, normalized size of antiderivative = 1.06 \[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=-\frac {1}{3} \, \sqrt {3} \arctan \left (\frac {4 \, \sqrt {3} {\left (x^{2} + x + 1\right )}^{\frac {1}{3}} x^{2} {\left (-x + 1\right )}^{\frac {1}{3}} + 2 \, \sqrt {3} {\left (x^{2} + x + 1\right )}^{\frac {2}{3}} x {\left (-x + 1\right )}^{\frac {2}{3}} - \sqrt {3} {\left (x^{3} - 1\right )}}{9 \, x^{3} - 1}\right ) + \frac {1}{6} \, \log \left (3 \, {\left (x^{2} + x + 1\right )}^{\frac {1}{3}} x^{2} {\left (-x + 1\right )}^{\frac {1}{3}} + 3 \, {\left (x^{2} + x + 1\right )}^{\frac {2}{3}} x {\left (-x + 1\right )}^{\frac {2}{3}} + 1\right ) \]
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\[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=\int \frac {1}{\sqrt [3]{1 - x} \sqrt [3]{x^{2} + x + 1}}\, dx \]
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\[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=\int { \frac {1}{{\left (x^{2} + x + 1\right )}^{\frac {1}{3}} {\left (-x + 1\right )}^{\frac {1}{3}}} \,d x } \]
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\[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=\int { \frac {1}{{\left (x^{2} + x + 1\right )}^{\frac {1}{3}} {\left (-x + 1\right )}^{\frac {1}{3}}} \,d x } \]
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Timed out. \[ \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx=\int \frac {1}{{\left (1-x\right )}^{1/3}\,{\left (x^2+x+1\right )}^{1/3}} \,d x \]
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