\[ \int \frac {\sec ^{\frac {7}{2}}(c+d x) (A+B \sec (c+d x))}{(a+a \sec (c+d x))^{3/2}} \, dx \]
Optimal antiderivative \[ -\frac {\left (12 A -19 B \right ) \arcsinh \left (\frac {\sqrt {a}\, \tan \left (d x +c \right )}{\sqrt {a +a \sec \left (d x +c \right )}}\right )}{4 a^{\frac {3}{2}} d}+\frac {\left (A -B \right ) \left (\sec ^{\frac {7}{2}}\left (d x +c \right )\right ) \sin \left (d x +c \right )}{2 d \left (a +a \sec \left (d x +c \right )\right )^{\frac {3}{2}}}+\frac {\left (9 A -13 B \right ) \arctanh \left (\frac {\sin \left (d x +c \right ) \sqrt {a}\, \left (\sqrt {\sec }\left (d x +c \right )\right ) \sqrt {2}}{2 \sqrt {a +a \sec \left (d x +c \right )}}\right ) \sqrt {2}}{4 a^{\frac {3}{2}} d}+\frac {\left (6 A -7 B \right ) \left (\sec ^{\frac {3}{2}}\left (d x +c \right )\right ) \sin \left (d x +c \right )}{4 a d \sqrt {a +a \sec \left (d x +c \right )}}-\frac {\left (A -2 B \right ) \left (\sec ^{\frac {5}{2}}\left (d x +c \right )\right ) \sin \left (d x +c \right )}{2 a d \sqrt {a +a \sec \left (d x +c \right )}} \]
command
integrate(sec(d*x+c)^(7/2)*(A+B*sec(d*x+c))/(a+a*sec(d*x+c))^(3/2),x, algorithm="maxima")
Maxima 5.46 SBCL 2.0.1.debian via sagemath 9.6 output
\[ \text {output too large to display} \]
Maxima 5.44 via sagemath 9.3 output \[ \text {Timed out} \]_____________________________________________________