\[ \int \frac {a+b \tan (e+f x)}{(d \sec (e+f x))^{7/2}} \, dx \]
Optimal antiderivative \[ -\frac {2 b}{7 f \left (d \sec \left (f x +e \right )\right )^{\frac {7}{2}}}+\frac {2 a \sin \left (f x +e \right )}{7 d f \left (d \sec \left (f x +e \right )\right )^{\frac {5}{2}}}+\frac {10 a \sin \left (f x +e \right )}{21 d^{3} f \sqrt {d \sec \left (f x +e \right )}}+\frac {10 a \sqrt {\frac {\cos \left (f x +e \right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (\frac {f x}{2}+\frac {e}{2}\right ), \sqrt {2}\right ) \left (\sqrt {\cos }\left (f x +e \right )\right ) \sqrt {d \sec \left (f x +e \right )}}{21 \cos \left (\frac {f x}{2}+\frac {e}{2}\right ) d^{4} f} \]
command
integrate((a+b*tan(f*x+e))/(d*sec(f*x+e))^(7/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \frac {-5 i \, \sqrt {2} a \sqrt {d} {\rm weierstrassPInverse}\left (-4, 0, \cos \left (f x + e\right ) + i \, \sin \left (f x + e\right )\right ) + 5 i \, \sqrt {2} a \sqrt {d} {\rm weierstrassPInverse}\left (-4, 0, \cos \left (f x + e\right ) - i \, \sin \left (f x + e\right )\right ) - 2 \, {\left (3 \, b \cos \left (f x + e\right )^{4} - {\left (3 \, a \cos \left (f x + e\right )^{3} + 5 \, a \cos \left (f x + e\right )\right )} \sin \left (f x + e\right )\right )} \sqrt {\frac {d}{\cos \left (f x + e\right )}}}{21 \, d^{4} f} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (\frac {\sqrt {d \sec \left (f x + e\right )} {\left (b \tan \left (f x + e\right ) + a\right )}}{d^{4} \sec \left (f x + e\right )^{4}}, x\right ) \]