36.32 Problem number 95

\[ \int \frac {x}{(2-x) \sqrt {-1-x^3}} \, dx \]

Optimal antiderivative \[ \frac {4 \arctan \left (\frac {\left (1+x \right )^{2}}{3 \sqrt {-x^{3}-1}}\right )}{9}-\frac {2 \left (1+x \right ) \EllipticF \left (\frac {1+x +\sqrt {3}}{1+x -\sqrt {3}}, 2 i-i \sqrt {3}\right ) \left (\frac {\sqrt {6}}{2}-\frac {\sqrt {2}}{2}\right ) \sqrt {\frac {x^{2}-x +1}{\left (1+x -\sqrt {3}\right )^{2}}}\, 3^{\frac {3}{4}}}{9 \sqrt {-x^{3}-1}\, \sqrt {\frac {-1-x}{\left (1+x -\sqrt {3}\right )^{2}}}} \]

command

integrate(x/(2-x)/(-x^3-1)^(1/2),x, algorithm="fricas")

Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output

\[ -\frac {2}{9} \, \arctan \left (\frac {{\left (x^{3} + 12 \, x^{2} - 6 \, x + 10\right )} \sqrt {-x^{3} - 1}}{6 \, {\left (x^{4} + x^{3} + x + 1\right )}}\right ) \]

Fricas 1.3.7 via sagemath 9.3 output

\[ {\rm integral}\left (\frac {\sqrt {-x^{3} - 1} x}{x^{4} - 2 \, x^{3} + x - 2}, x\right ) \]