Integrand size = 32, antiderivative size = 124 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=-\frac {\sqrt {3} \arctan \left (\frac {\sqrt [3]{b}-2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}+\frac {\sqrt {3} \arctan \left (\frac {\sqrt [3]{b}+2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}-\frac {\log \left (b^{2/3}-\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}}+\frac {\log \left (b^{2/3}+\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}} \]
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Time = 0.05 (sec) , antiderivative size = 124, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.156, Rules used = {1183, 648, 631, 210, 642} \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=-\frac {\sqrt {3} \arctan \left (\frac {\sqrt [3]{b}-2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}+\frac {\sqrt {3} \arctan \left (\frac {\sqrt [3]{b}+2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}-\frac {\log \left (b^{2/3}-\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}}+\frac {\log \left (b^{2/3}+\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}} \]
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Rule 210
Rule 631
Rule 642
Rule 648
Rule 1183
Rubi steps \begin{align*} \text {integral}& = \frac {\int \frac {2 b-b^{2/3} x}{b^{2/3}-\sqrt [3]{b} x+x^2} \, dx}{2 b}+\frac {\int \frac {2 b+b^{2/3} x}{b^{2/3}+\sqrt [3]{b} x+x^2} \, dx}{2 b} \\ & = \frac {3}{4} \int \frac {1}{b^{2/3}-\sqrt [3]{b} x+x^2} \, dx+\frac {3}{4} \int \frac {1}{b^{2/3}+\sqrt [3]{b} x+x^2} \, dx-\frac {\int \frac {-\sqrt [3]{b}+2 x}{b^{2/3}-\sqrt [3]{b} x+x^2} \, dx}{4 \sqrt [3]{b}}+\frac {\int \frac {\sqrt [3]{b}+2 x}{b^{2/3}+\sqrt [3]{b} x+x^2} \, dx}{4 \sqrt [3]{b}} \\ & = -\frac {\log \left (b^{2/3}-\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}}+\frac {\log \left (b^{2/3}+\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}}+\frac {3 \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1-\frac {2 x}{\sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}-\frac {3 \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1+\frac {2 x}{\sqrt [3]{b}}\right )}{2 \sqrt [3]{b}} \\ & = -\frac {\sqrt {3} \tan ^{-1}\left (\frac {\sqrt [3]{b}-2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}+\frac {\sqrt {3} \tan ^{-1}\left (\frac {\sqrt [3]{b}+2 x}{\sqrt {3} \sqrt [3]{b}}\right )}{2 \sqrt [3]{b}}-\frac {\log \left (b^{2/3}-\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}}+\frac {\log \left (b^{2/3}+\sqrt [3]{b} x+x^2\right )}{4 \sqrt [3]{b}} \\ \end{align*}
Result contains complex when optimal does not.
Time = 0.09 (sec) , antiderivative size = 115, normalized size of antiderivative = 0.93 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\frac {\sqrt [4]{-1} \left (\sqrt {-i+\sqrt {3}} \left (-3 i+\sqrt {3}\right ) \arctan \left (\frac {(1+i) x}{\sqrt {i+\sqrt {3}} \sqrt [3]{b}}\right )-\sqrt {i+\sqrt {3}} \left (3 i+\sqrt {3}\right ) \text {arctanh}\left (\frac {(1+i) x}{\sqrt {-i+\sqrt {3}} \sqrt [3]{b}}\right )\right )}{2 \sqrt {6} \sqrt [3]{b}} \]
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Time = 0.12 (sec) , antiderivative size = 87, normalized size of antiderivative = 0.70
method | result | size |
default | \(\frac {-\frac {\ln \left (b^{\frac {2}{3}}-b^{\frac {1}{3}} x +x^{2}\right )}{2}+\sqrt {3}\, \arctan \left (\frac {\left (-b^{\frac {1}{3}}+2 x \right ) \sqrt {3}}{3 b^{\frac {1}{3}}}\right )}{2 b^{\frac {1}{3}}}+\frac {\frac {\ln \left (b^{\frac {2}{3}}+b^{\frac {1}{3}} x +x^{2}\right )}{2}+\arctan \left (\frac {\left (b^{\frac {1}{3}}+2 x \right ) \sqrt {3}}{3 b^{\frac {1}{3}}}\right ) \sqrt {3}}{2 b^{\frac {1}{3}}}\) | \(87\) |
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Time = 0.29 (sec) , antiderivative size = 264, normalized size of antiderivative = 2.13 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\left [\frac {\sqrt {3} b \sqrt {-\frac {1}{b^{\frac {2}{3}}}} \log \left (\frac {2 \, x^{3} + \sqrt {3} {\left (2 \, b^{\frac {2}{3}} x^{2} + b x - b^{\frac {4}{3}}\right )} \sqrt {-\frac {1}{b^{\frac {2}{3}}}} - 3 \, b^{\frac {2}{3}} x - b}{x^{3} + b}\right ) + \sqrt {3} b \sqrt {-\frac {1}{b^{\frac {2}{3}}}} \log \left (\frac {2 \, x^{3} + \sqrt {3} {\left (2 \, b^{\frac {2}{3}} x^{2} - b x - b^{\frac {4}{3}}\right )} \sqrt {-\frac {1}{b^{\frac {2}{3}}}} - 3 \, b^{\frac {2}{3}} x + b}{x^{3} - b}\right ) + b^{\frac {2}{3}} \log \left (x^{2} + b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right ) - b^{\frac {2}{3}} \log \left (x^{2} - b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b}, \frac {2 \, \sqrt {3} b^{\frac {2}{3}} \arctan \left (\frac {\sqrt {3} {\left (2 \, x + b^{\frac {1}{3}}\right )}}{3 \, b^{\frac {1}{3}}}\right ) - 2 \, \sqrt {3} b^{\frac {2}{3}} \arctan \left (-\frac {\sqrt {3} {\left (2 \, x - b^{\frac {1}{3}}\right )}}{3 \, b^{\frac {1}{3}}}\right ) + b^{\frac {2}{3}} \log \left (x^{2} + b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right ) - b^{\frac {2}{3}} \log \left (x^{2} - b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b}\right ] \]
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Result contains complex when optimal does not.
Time = 0.13 (sec) , antiderivative size = 143, normalized size of antiderivative = 1.15 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\frac {\left (- \frac {1}{4} - \frac {\sqrt {3} i}{4}\right ) \log {\left (2 \sqrt [3]{b} \left (- \frac {1}{4} - \frac {\sqrt {3} i}{4}\right ) + x \right )} + \left (- \frac {1}{4} + \frac {\sqrt {3} i}{4}\right ) \log {\left (2 \sqrt [3]{b} \left (- \frac {1}{4} + \frac {\sqrt {3} i}{4}\right ) + x \right )} + \left (\frac {1}{4} - \frac {\sqrt {3} i}{4}\right ) \log {\left (2 \sqrt [3]{b} \left (\frac {1}{4} - \frac {\sqrt {3} i}{4}\right ) + x \right )} + \left (\frac {1}{4} + \frac {\sqrt {3} i}{4}\right ) \log {\left (2 \sqrt [3]{b} \left (\frac {1}{4} + \frac {\sqrt {3} i}{4}\right ) + x \right )}}{\sqrt [3]{b}} \]
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Time = 0.28 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.71 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (2 \, x + b^{\frac {1}{3}}\right )}}{3 \, b^{\frac {1}{3}}}\right )}{2 \, b^{\frac {1}{3}}} + \frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (2 \, x - b^{\frac {1}{3}}\right )}}{3 \, b^{\frac {1}{3}}}\right )}{2 \, b^{\frac {1}{3}}} + \frac {\log \left (x^{2} + b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b^{\frac {1}{3}}} - \frac {\log \left (x^{2} - b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b^{\frac {1}{3}}} \]
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Time = 0.30 (sec) , antiderivative size = 92, normalized size of antiderivative = 0.74 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (2 \, x + b^{\frac {1}{3}}\right )}}{3 \, {\left | b \right |}^{\frac {1}{3}}}\right )}{2 \, {\left | b \right |}^{\frac {1}{3}}} + \frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (2 \, x - b^{\frac {1}{3}}\right )}}{3 \, {\left | b \right |}^{\frac {1}{3}}}\right )}{2 \, {\left | b \right |}^{\frac {1}{3}}} + \frac {\log \left (x^{2} + b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b^{\frac {1}{3}}} - \frac {\log \left (x^{2} - b^{\frac {1}{3}} x + b^{\frac {2}{3}}\right )}{4 \, b^{\frac {1}{3}}} \]
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Time = 14.10 (sec) , antiderivative size = 133, normalized size of antiderivative = 1.07 \[ \int \frac {2 b^{2/3}+x^2}{b^{4/3}+b^{2/3} x^2+x^4} \, dx=\frac {\sqrt {8}\,\mathrm {atan}\left (x\,\sqrt {-\frac {1}{8\,b^{2/3}}-\frac {\sqrt {3}\,1{}\mathrm {i}}{8\,b^{2/3}}}\,1{}\mathrm {i}+\sqrt {3}\,x\,\sqrt {-\frac {1}{8\,b^{2/3}}-\frac {\sqrt {3}\,1{}\mathrm {i}}{8\,b^{2/3}}}\right )\,\sqrt {-\frac {1+\sqrt {3}\,1{}\mathrm {i}}{b^{2/3}}}\,1{}\mathrm {i}}{4}+\frac {\sqrt {8}\,\mathrm {atan}\left (x\,\sqrt {-\frac {1}{8\,b^{2/3}}+\frac {\sqrt {3}\,1{}\mathrm {i}}{8\,b^{2/3}}}\,1{}\mathrm {i}-\sqrt {3}\,x\,\sqrt {-\frac {1}{8\,b^{2/3}}+\frac {\sqrt {3}\,1{}\mathrm {i}}{8\,b^{2/3}}}\right )\,\sqrt {\frac {-1+\sqrt {3}\,1{}\mathrm {i}}{b^{2/3}}}\,1{}\mathrm {i}}{4} \]
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