\[ \int \sqrt {1+x} \sqrt {1-x+x^2} \, dx \]
Optimal antiderivative \[ \frac {2 x \sqrt {1+x}\, \sqrt {x^{2}-x +1}}{5}+\frac {2 \,3^{\frac {3}{4}} \left (1+x \right )^{\frac {3}{2}} \EllipticF \left (\frac {1+x -\sqrt {3}}{1+x +\sqrt {3}}, i \sqrt {3}+2 i\right ) \sqrt {x^{2}-x +1}\, \left (\frac {\sqrt {6}}{2}+\frac {\sqrt {2}}{2}\right ) \sqrt {\frac {x^{2}-x +1}{\left (1+x +\sqrt {3}\right )^{2}}}}{5 \left (x^{3}+1\right ) \sqrt {\frac {1+x}{\left (1+x +\sqrt {3}\right )^{2}}}} \]
command
integrate((1+x)^(1/2)*(x^2-x+1)^(1/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \frac {2}{5} \, \sqrt {x^{2} - x + 1} \sqrt {x + 1} x + \frac {6}{5} \, {\rm weierstrassPInverse}\left (0, -4, x\right ) \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (\sqrt {x^{2} - x + 1} \sqrt {x + 1}, x\right ) \]