Optimal. Leaf size=42 \[ \frac {\tan ^{-1}\left (\frac {\sqrt {f} \left (2 x^2 (d+f)+e\right )}{\sqrt {d} e}\right )}{4 \sqrt {d} e \sqrt {f}} \]
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Rubi [A] time = 0.07, antiderivative size = 42, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 30, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.133, Rules used = {6, 1107, 618, 204} \[ \frac {\tan ^{-1}\left (\frac {\sqrt {f} \left (2 x^2 (d+f)+e\right )}{\sqrt {d} e}\right )}{4 \sqrt {d} e \sqrt {f}} \]
Antiderivative was successfully verified.
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Rule 6
Rule 204
Rule 618
Rule 1107
Rubi steps
\begin {align*} \int \frac {x}{e^2+4 e f x^2+4 d f x^4+4 f^2 x^4} \, dx &=\int \frac {x}{e^2+4 e f x^2+4 \left (d f+f^2\right ) x^4} \, dx\\ &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {1}{e^2+4 e f x+4 \left (d f+f^2\right ) x^2} \, dx,x,x^2\right )\\ &=-\operatorname {Subst}\left (\int \frac {1}{-16 d e^2 f-x^2} \, dx,x,4 f \left (e+2 (d+f) x^2\right )\right )\\ &=\frac {\tan ^{-1}\left (\frac {\sqrt {f} \left (e+2 (d+f) x^2\right )}{\sqrt {d} e}\right )}{4 \sqrt {d} e \sqrt {f}}\\ \end {align*}
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Mathematica [A] time = 0.02, size = 42, normalized size = 1.00 \[ \frac {\tan ^{-1}\left (\frac {\sqrt {f} \left (2 x^2 (d+f)+e\right )}{\sqrt {d} e}\right )}{4 \sqrt {d} e \sqrt {f}} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.48, size = 155, normalized size = 3.69 \[ \left [-\frac {\sqrt {-d f} \log \left (\frac {4 \, {\left (d^{2} f + 2 \, d f^{2} + f^{3}\right )} x^{4} - d e^{2} + e^{2} f + 4 \, {\left (d e f + e f^{2}\right )} x^{2} - 2 \, {\left (2 \, {\left (d e + e f\right )} x^{2} + e^{2}\right )} \sqrt {-d f}}{4 \, {\left (d f + f^{2}\right )} x^{4} + 4 \, e f x^{2} + e^{2}}\right )}{8 \, d e f}, \frac {\sqrt {d f} \arctan \left (\frac {{\left (2 \, {\left (d + f\right )} x^{2} + e\right )} \sqrt {d f}}{d e}\right )}{4 \, d e f}\right ] \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 10.58, size = 38, normalized size = 0.90 \[ \frac {\arctan \left (\frac {{\left (2 \, d f x^{2} + 2 \, f^{2} x^{2} + f e\right )} e^{\left (-1\right )}}{\sqrt {d f}}\right ) e^{\left (-1\right )}}{4 \, \sqrt {d f}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.00, size = 42, normalized size = 1.00 \[ \frac {\arctan \left (\frac {4 e f +2 \left (4 d f +4 f^{2}\right ) x^{2}}{4 \sqrt {d f}\, e}\right )}{4 \sqrt {d f}\, e} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 2.17, size = 36, normalized size = 0.86 \[ \frac {\arctan \left (\frac {2 \, {\left (d f + f^{2}\right )} x^{2} + e f}{\sqrt {d f} e}\right )}{4 \, \sqrt {d f} e} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 3.10, size = 42, normalized size = 1.00 \[ \frac {\mathrm {atan}\left (\frac {e\,\sqrt {f}+2\,f^{3/2}\,x^2+2\,d\,\sqrt {f}\,x^2}{\sqrt {d}\,e}\right )}{4\,\sqrt {d}\,e\,\sqrt {f}} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [B] time = 0.62, size = 78, normalized size = 1.86 \[ \frac {- \frac {\sqrt {- \frac {1}{d f}} \log {\left (x^{2} + \frac {- d e \sqrt {- \frac {1}{d f}} + e}{2 d + 2 f} \right )}}{8} + \frac {\sqrt {- \frac {1}{d f}} \log {\left (x^{2} + \frac {d e \sqrt {- \frac {1}{d f}} + e}{2 d + 2 f} \right )}}{8}}{e} \]
Verification of antiderivative is not currently implemented for this CAS.
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