\[ \int \cosh ^3(e+f x) \sqrt {a+b \sinh ^2(e+f x)} \, dx \]
Optimal antiderivative \[ -\frac {a \left (a -4 b \right ) \arctanh \left (\frac {\sinh \left (f x +e \right ) \sqrt {b}}{\sqrt {a +b \left (\sinh ^{2}\left (f x +e \right )\right )}}\right )}{8 b^{\frac {3}{2}} f}+\frac {\sinh \left (f x +e \right ) \left (a +b \left (\sinh ^{2}\left (f x +e \right )\right )\right )^{\frac {3}{2}}}{4 b f}-\frac {\left (a -4 b \right ) \sinh \left (f x +e \right ) \sqrt {a +b \left (\sinh ^{2}\left (f x +e \right )\right )}}{8 b f} \]
command
integrate(cosh(f*x+e)^3*(a+b*sinh(f*x+e)^2)^(1/2),x, algorithm="giac")
Giac 1.9.0-11 via sagemath 9.6 output
\[ \text {output too large to display} \]
Giac 1.7.0 via sagemath 9.3 output \[ \text {Exception raised: TypeError} \]_______________________________________________________