75.5 Problem number 5

\[ \int \frac {\sec (e+f x) (a+a \sec (e+f x))}{c-c \sec (e+f x)} \, dx \]

Optimal antiderivative \[ -\frac {a \arctanh \left (\sin \left (f x +e \right )\right )}{c f}-\frac {2 a \tan \left (f x +e \right )}{f \left (c -c \sec \left (f x +e \right )\right )} \]

command

integrate(sec(f*x+e)*(a+a*sec(f*x+e))/(c-c*sec(f*x+e)),x, algorithm="giac")

Giac 1.9.0-11 via sagemath 9.6 output

\[ -\frac {\frac {a \log \left ({\left | \tan \left (\frac {1}{2} \, f x + \frac {1}{2} \, e\right ) + 1 \right |}\right )}{c} - \frac {a \log \left ({\left | \tan \left (\frac {1}{2} \, f x + \frac {1}{2} \, e\right ) - 1 \right |}\right )}{c} - \frac {2 \, a}{c \tan \left (\frac {1}{2} \, f x + \frac {1}{2} \, e\right )}}{f} \]

Giac 1.7.0 via sagemath 9.3 output

\[ \text {Exception raised: NotImplementedError} \]________________________________________________________________________________________