\[ \int -\frac {15 e^2}{1550-620 e x+62 e^2 x^2} \, dx \]
Optimal antiderivative \[ \frac {15}{62 \left (x -5 \,{\mathrm e}^{-1}\right )} \]
command
integrate(-15*exp(1)^2/(62*x^2*exp(1)^2-620*x*exp(1)+1550),x, algorithm="giac")
Giac 1.9.0-11 via sagemath 9.6 output
\[ \frac {15 \, e}{62 \, {\left (x e - 5\right )}} \]
Giac 1.7.0 via sagemath 9.3 output
\[ \text {Exception raised: NotImplementedError} \]________________________________________________________________________________________