\[ \int \frac {1}{\sqrt {1-x^2} \sqrt {2+x^2}} \, dx \]
Optimal antiderivative \[ \frac {\EllipticF \left (x , \frac {i \sqrt {2}}{2}\right ) \sqrt {2}}{2} \]
command
integrate(1/(-x^2+1)^(1/2)/(x^2+2)^(1/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \frac {1}{2} \, \sqrt {2} {\rm ellipticF}\left (x, -\frac {1}{2}\right ) \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (-\frac {\sqrt {x^{2} + 2} \sqrt {-x^{2} + 1}}{x^{4} + x^{2} - 2}, x\right ) \]