Optimal. Leaf size=399 \[ -\frac {i \sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}+\frac {i \sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}+\frac {\left (7+i \sqrt {7}\right ) \log \left (\sqrt [3]{1-i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \log \left (\sqrt [3]{1+i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}-\frac {\left (7+i \sqrt {7}\right ) \log \left (\left (1-i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1-i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}-\frac {\left (7-i \sqrt {7}\right ) \log \left (\left (1+i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1+i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}} \]
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Rubi [A]
time = 0.19, antiderivative size = 399, normalized size of antiderivative = 1.00, number of steps
used = 13, number of rules used = 7, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {1388, 206, 31,
648, 631, 210, 642} \begin {gather*} -\frac {i \sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} \text {ArcTan}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}+\frac {i \sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} \text {ArcTan}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}-\frac {\left (7+i \sqrt {7}\right ) \log \left (2^{2/3} x^2-\sqrt [3]{2 \left (1-i \sqrt {7}\right )} x+\left (1-i \sqrt {7}\right )^{2/3}\right )}{42 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}-\frac {\left (7-i \sqrt {7}\right ) \log \left (2^{2/3} x^2-\sqrt [3]{2 \left (1+i \sqrt {7}\right )} x+\left (1+i \sqrt {7}\right )^{2/3}\right )}{42 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7+i \sqrt {7}\right ) \log \left (\sqrt [3]{2} x+\sqrt [3]{1-i \sqrt {7}}\right )}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \log \left (\sqrt [3]{2} x+\sqrt [3]{1+i \sqrt {7}}\right )}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}} \end {gather*}
Antiderivative was successfully verified.
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Rule 31
Rule 206
Rule 210
Rule 631
Rule 642
Rule 648
Rule 1388
Rubi steps
\begin {align*} \int \frac {x^3}{2+x^3+x^6} \, dx &=\frac {1}{14} \left (7-i \sqrt {7}\right ) \int \frac {1}{\frac {1}{2}+\frac {i \sqrt {7}}{2}+x^3} \, dx+\frac {1}{14} \left (7+i \sqrt {7}\right ) \int \frac {1}{\frac {1}{2}-\frac {i \sqrt {7}}{2}+x^3} \, dx\\ &=\frac {\left (7-i \sqrt {7}\right ) \int \frac {1}{\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}+x} \, dx}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \int \frac {2^{2/3} \sqrt [3]{1+i \sqrt {7}}-x}{\left (\frac {1}{2} \left (1+i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} x+x^2} \, dx}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7+i \sqrt {7}\right ) \int \frac {1}{\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}+x} \, dx}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7+i \sqrt {7}\right ) \int \frac {2^{2/3} \sqrt [3]{1-i \sqrt {7}}-x}{\left (\frac {1}{2} \left (1-i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} x+x^2} \, dx}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}\\ &=\frac {\left (7+i \sqrt {7}\right ) \log \left (\sqrt [3]{1-i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \log \left (\sqrt [3]{1+i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}-\frac {\left (7-i \sqrt {7}\right ) \int \frac {-\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}+2 x}{\left (\frac {1}{2} \left (1+i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} x+x^2} \, dx}{42 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \int \frac {1}{\left (\frac {1}{2} \left (1+i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} x+x^2} \, dx}{14\ 2^{2/3} \sqrt [3]{1+i \sqrt {7}}}-\frac {\left (7+i \sqrt {7}\right ) \int \frac {-\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}+2 x}{\left (\frac {1}{2} \left (1-i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} x+x^2} \, dx}{42 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7+i \sqrt {7}\right ) \int \frac {1}{\left (\frac {1}{2} \left (1-i \sqrt {7}\right )\right )^{2/3}-\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} x+x^2} \, dx}{14\ 2^{2/3} \sqrt [3]{1-i \sqrt {7}}}\\ &=\frac {\left (7+i \sqrt {7}\right ) \log \left (\sqrt [3]{1-i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \log \left (\sqrt [3]{1+i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}-\frac {\left (7+i \sqrt {7}\right ) \log \left (\left (1-i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1-i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}-\frac {\left (7-i \sqrt {7}\right ) \log \left (\left (1+i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1+i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}}\right )}{7 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}+\frac {\left (7+i \sqrt {7}\right ) \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}}\right )}{7 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}\\ &=-\frac {i \sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1-i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}+\frac {i \sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{\frac {1}{2} \left (1+i \sqrt {7}\right )}}}{\sqrt {3}}\right )}{\sqrt {21}}+\frac {\left (7+i \sqrt {7}\right ) \log \left (\sqrt [3]{1-i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}+\frac {\left (7-i \sqrt {7}\right ) \log \left (\sqrt [3]{1+i \sqrt {7}}+\sqrt [3]{2} x\right )}{21 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}-\frac {\left (7+i \sqrt {7}\right ) \log \left (\left (1-i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1-i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1-i \sqrt {7}\right )^{2/3}}-\frac {\left (7-i \sqrt {7}\right ) \log \left (\left (1+i \sqrt {7}\right )^{2/3}-\sqrt [3]{2 \left (1+i \sqrt {7}\right )} x+2^{2/3} x^2\right )}{42 \sqrt [3]{2} \left (1+i \sqrt {7}\right )^{2/3}}\\ \end {align*}
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Mathematica [C] Result contains higher order function than in optimal. Order 9 vs. order 3 in
optimal.
time = 0.01, size = 37, normalized size = 0.09 \begin {gather*} \frac {1}{3} \text {RootSum}\left [2+\text {$\#$1}^3+\text {$\#$1}^6\&,\frac {\log (x-\text {$\#$1}) \text {$\#$1}}{1+2 \text {$\#$1}^3}\&\right ] \end {gather*}
Antiderivative was successfully verified.
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Maple [C] Result contains higher order function than in optimal. Order 9 vs. order
3.
time = 0.02, size = 36, normalized size = 0.09
method | result | size |
default | \(\frac {\left (\munderset {\textit {\_R} =\RootOf \left (\textit {\_Z}^{6}+\textit {\_Z}^{3}+2\right )}{\sum }\frac {\textit {\_R}^{3} \ln \left (x -\textit {\_R} \right )}{2 \textit {\_R}^{5}+\textit {\_R}^{2}}\right )}{3}\) | \(36\) |
risch | \(\frac {\left (\munderset {\textit {\_R} =\RootOf \left (\textit {\_Z}^{6}+\textit {\_Z}^{3}+2\right )}{\sum }\frac {\textit {\_R}^{3} \ln \left (x -\textit {\_R} \right )}{2 \textit {\_R}^{5}+\textit {\_R}^{2}}\right )}{3}\) | \(36\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 1048 vs.
\(2 (263) = 526\).
time = 0.43, size = 1048, normalized size = 2.63 \begin {gather*} \text {Too large to display} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.05, size = 24, normalized size = 0.06 \begin {gather*} \operatorname {RootSum} {\left (250047 t^{6} + 1323 t^{3} + 2, \left ( t \mapsto t \log {\left (7938 t^{4} + 21 t + x \right )} \right )\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 2.61, size = 351, normalized size = 0.88 \begin {gather*} \frac {\ln \left (x-\frac {2^{2/3}\,7^{5/6}\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{14}\right )\,{\left (-196-\sqrt {7}\,28{}\mathrm {i}\right )}^{1/3}}{42}+\frac {2^{2/3}\,7^{1/3}\,\ln \left (x+\frac {2^{2/3}\,7^{5/6}\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{14}\right )\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{42}-\frac {2^{2/3}\,7^{1/3}\,\ln \left (x+\frac {2^{2/3}\,7^{5/6}\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{28}-\frac {2^{2/3}\,\sqrt {3}\,7^{5/6}\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{28}\right )\,\left (1+\sqrt {3}\,1{}\mathrm {i}\right )\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{84}+\frac {2^{2/3}\,7^{1/3}\,\ln \left (x+\frac {2^{2/3}\,7^{5/6}\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{28}+\frac {2^{2/3}\,\sqrt {3}\,7^{5/6}\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{28}\right )\,\left (-1+\sqrt {3}\,1{}\mathrm {i}\right )\,{\left (-7-\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{84}+\frac {2^{2/3}\,7^{1/3}\,\ln \left (x-\frac {2^{2/3}\,7^{5/6}\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{28}-\frac {2^{2/3}\,\sqrt {3}\,7^{5/6}\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{28}\right )\,\left (-1+\sqrt {3}\,1{}\mathrm {i}\right )\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{84}-\frac {2^{2/3}\,7^{1/3}\,\ln \left (x-\frac {2^{2/3}\,7^{5/6}\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}\,1{}\mathrm {i}}{28}+\frac {2^{2/3}\,\sqrt {3}\,7^{5/6}\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{28}\right )\,\left (1+\sqrt {3}\,1{}\mathrm {i}\right )\,{\left (-7+\sqrt {7}\,1{}\mathrm {i}\right )}^{1/3}}{84} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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