3.1343 \(\int \frac{x^7}{1-x^6} \, dx\)

Optimal. Leaf size=56 \[ -\frac{x^2}{2}-\frac{1}{6} \log \left (1-x^2\right )+\frac{\tan ^{-1}\left (\frac{2 x^2+1}{\sqrt{3}}\right )}{2 \sqrt{3}}+\frac{1}{12} \log \left (x^4+x^2+1\right ) \]

[Out]

-x^2/2 + ArcTan[(1 + 2*x^2)/Sqrt[3]]/(2*Sqrt[3]) - Log[1 - x^2]/6 + Log[1 + x^2
+ x^4]/12

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Rubi [A]  time = 0.084001, antiderivative size = 56, normalized size of antiderivative = 1., number of steps used = 8, number of rules used = 8, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.615 \[ -\frac{x^2}{2}-\frac{1}{6} \log \left (1-x^2\right )+\frac{\tan ^{-1}\left (\frac{2 x^2+1}{\sqrt{3}}\right )}{2 \sqrt{3}}+\frac{1}{12} \log \left (x^4+x^2+1\right ) \]

Antiderivative was successfully verified.

[In]  Int[x^7/(1 - x^6),x]

[Out]

-x^2/2 + ArcTan[(1 + 2*x^2)/Sqrt[3]]/(2*Sqrt[3]) - Log[1 - x^2]/6 + Log[1 + x^2
+ x^4]/12

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Rubi in Sympy [A]  time = 9.38667, size = 48, normalized size = 0.86 \[ - \frac{x^{2}}{2} - \frac{\log{\left (- x^{2} + 1 \right )}}{6} + \frac{\log{\left (x^{4} + x^{2} + 1 \right )}}{12} + \frac{\sqrt{3} \operatorname{atan}{\left (\sqrt{3} \left (\frac{2 x^{2}}{3} + \frac{1}{3}\right ) \right )}}{6} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  rubi_integrate(x**7/(-x**6+1),x)

[Out]

-x**2/2 - log(-x**2 + 1)/6 + log(x**4 + x**2 + 1)/12 + sqrt(3)*atan(sqrt(3)*(2*x
**2/3 + 1/3))/6

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Mathematica [A]  time = 0.0339387, size = 78, normalized size = 1.39 \[ \frac{1}{12} \left (-6 x^2+\log \left (x^2-x+1\right )+\log \left (x^2+x+1\right )-2 \log (1-x)-2 \log (x+1)+2 \sqrt{3} \tan ^{-1}\left (\frac{2 x-1}{\sqrt{3}}\right )-2 \sqrt{3} \tan ^{-1}\left (\frac{2 x+1}{\sqrt{3}}\right )\right ) \]

Antiderivative was successfully verified.

[In]  Integrate[x^7/(1 - x^6),x]

[Out]

(-6*x^2 + 2*Sqrt[3]*ArcTan[(-1 + 2*x)/Sqrt[3]] - 2*Sqrt[3]*ArcTan[(1 + 2*x)/Sqrt
[3]] - 2*Log[1 - x] - 2*Log[1 + x] + Log[1 - x + x^2] + Log[1 + x + x^2])/12

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Maple [A]  time = 0.017, size = 71, normalized size = 1.3 \[ -{\frac{{x}^{2}}{2}}+{\frac{\ln \left ({x}^{2}+x+1 \right ) }{12}}-{\frac{\sqrt{3}}{6}\arctan \left ({\frac{ \left ( 1+2\,x \right ) \sqrt{3}}{3}} \right ) }-{\frac{\ln \left ( -1+x \right ) }{6}}+{\frac{\ln \left ({x}^{2}-x+1 \right ) }{12}}+{\frac{\sqrt{3}}{6}\arctan \left ({\frac{ \left ( 2\,x-1 \right ) \sqrt{3}}{3}} \right ) }-{\frac{\ln \left ( 1+x \right ) }{6}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  int(x^7/(-x^6+1),x)

[Out]

-1/2*x^2+1/12*ln(x^2+x+1)-1/6*arctan(1/3*(1+2*x)*3^(1/2))*3^(1/2)-1/6*ln(-1+x)+1
/12*ln(x^2-x+1)+1/6*3^(1/2)*arctan(1/3*(2*x-1)*3^(1/2))-1/6*ln(1+x)

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Maxima [A]  time = 1.59159, size = 58, normalized size = 1.04 \[ -\frac{1}{2} \, x^{2} + \frac{1}{6} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x^{2} + 1\right )}\right ) + \frac{1}{12} \, \log \left (x^{4} + x^{2} + 1\right ) - \frac{1}{6} \, \log \left (x^{2} - 1\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(-x^7/(x^6 - 1),x, algorithm="maxima")

[Out]

-1/2*x^2 + 1/6*sqrt(3)*arctan(1/3*sqrt(3)*(2*x^2 + 1)) + 1/12*log(x^4 + x^2 + 1)
- 1/6*log(x^2 - 1)

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Fricas [A]  time = 0.225738, size = 73, normalized size = 1.3 \[ -\frac{1}{36} \, \sqrt{3}{\left (6 \, \sqrt{3} x^{2} - \sqrt{3} \log \left (x^{4} + x^{2} + 1\right ) + 2 \, \sqrt{3} \log \left (x^{2} - 1\right ) - 6 \, \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x^{2} + 1\right )}\right )\right )} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(-x^7/(x^6 - 1),x, algorithm="fricas")

[Out]

-1/36*sqrt(3)*(6*sqrt(3)*x^2 - sqrt(3)*log(x^4 + x^2 + 1) + 2*sqrt(3)*log(x^2 -
1) - 6*arctan(1/3*sqrt(3)*(2*x^2 + 1)))

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Sympy [A]  time = 0.427112, size = 51, normalized size = 0.91 \[ - \frac{x^{2}}{2} - \frac{\log{\left (x^{2} - 1 \right )}}{6} + \frac{\log{\left (x^{4} + x^{2} + 1 \right )}}{12} + \frac{\sqrt{3} \operatorname{atan}{\left (\frac{2 \sqrt{3} x^{2}}{3} + \frac{\sqrt{3}}{3} \right )}}{6} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(x**7/(-x**6+1),x)

[Out]

-x**2/2 - log(x**2 - 1)/6 + log(x**4 + x**2 + 1)/12 + sqrt(3)*atan(2*sqrt(3)*x**
2/3 + sqrt(3)/3)/6

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GIAC/XCAS [A]  time = 0.227228, size = 59, normalized size = 1.05 \[ -\frac{1}{2} \, x^{2} + \frac{1}{6} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x^{2} + 1\right )}\right ) + \frac{1}{12} \,{\rm ln}\left (x^{4} + x^{2} + 1\right ) - \frac{1}{6} \,{\rm ln}\left ({\left | x^{2} - 1 \right |}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(-x^7/(x^6 - 1),x, algorithm="giac")

[Out]

-1/2*x^2 + 1/6*sqrt(3)*arctan(1/3*sqrt(3)*(2*x^2 + 1)) + 1/12*ln(x^4 + x^2 + 1)
- 1/6*ln(abs(x^2 - 1))