\[ \int \cos ^{\frac {9}{2}}(c+d x) (a+b \sec (c+d x))^4 \left (A+B \sec (c+d x)+C \sec ^2(c+d x)\right ) \, dx \]
Optimal antiderivative \[ \frac {2 \left (36 a^{3} b B +60 a \,b^{3} B +15 b^{4} \left (A -C \right )+18 a^{2} b^{2} \left (3 A +5 C \right )+a^{4} \left (7 A +9 C \right )\right ) \sqrt {\frac {\cos \left (d x +c \right )}{2}+\frac {1}{2}}\, \EllipticE \left (\sin \left (\frac {d x}{2}+\frac {c}{2}\right ), \sqrt {2}\right )}{15 \cos \left (\frac {d x}{2}+\frac {c}{2}\right ) d}+\frac {2 \left (5 a^{4} B +42 B \,a^{2} b^{2}+21 b^{4} B +28 a \,b^{3} \left (A +3 C \right )+4 a^{3} b \left (5 A +7 C \right )\right ) \sqrt {\frac {\cos \left (d x +c \right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (\frac {d x}{2}+\frac {c}{2}\right ), \sqrt {2}\right )}{21 \cos \left (\frac {d x}{2}+\frac {c}{2}\right ) d}+\frac {2 a^{2} \left (162 a b B +3 b^{2} \left (41 A -105 C \right )+7 a^{2} \left (7 A +9 C \right )\right ) \left (\cos ^{\frac {3}{2}}\left (d x +c \right )\right ) \sin \left (d x +c \right )}{315 d}+\frac {2 C \left (b +a \cos \left (d x +c \right )\right )^{4} \sin \left (d x +c \right )}{d \sqrt {\cos \left (d x +c \right )}}+\frac {2 a \left (15 a^{3} B +117 B a \,b^{2}+2 b^{3} \left (31 A -63 C \right )+12 a^{2} b \left (5 A +7 C \right )\right ) \sin \left (d x +c \right ) \left (\sqrt {\cos }\left (d x +c \right )\right )}{63 d}+\frac {2 a \left (5 A b +3 B a -21 C b \right ) \left (b +a \cos \left (d x +c \right )\right )^{2} \sin \left (d x +c \right ) \left (\sqrt {\cos }\left (d x +c \right )\right )}{21 d}+\frac {2 a \left (A -9 C \right ) \left (b +a \cos \left (d x +c \right )\right )^{3} \sin \left (d x +c \right ) \left (\sqrt {\cos }\left (d x +c \right )\right )}{9 d} \]
command
integrate(cos(d*x+c)^(9/2)*(a+b*sec(d*x+c))^4*(A+B*sec(d*x+c)+C*sec(d*x+c)^2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ -\frac {15 \, \sqrt {2} {\left (5 i \, B a^{4} + 4 i \, {\left (5 \, A + 7 \, C\right )} a^{3} b + 42 i \, B a^{2} b^{2} + 28 i \, {\left (A + 3 \, C\right )} a b^{3} + 21 i \, B b^{4}\right )} \cos \left (d x + c\right ) {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) + i \, \sin \left (d x + c\right )\right ) + 15 \, \sqrt {2} {\left (-5 i \, B a^{4} - 4 i \, {\left (5 \, A + 7 \, C\right )} a^{3} b - 42 i \, B a^{2} b^{2} - 28 i \, {\left (A + 3 \, C\right )} a b^{3} - 21 i \, B b^{4}\right )} \cos \left (d x + c\right ) {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) - i \, \sin \left (d x + c\right )\right ) + 21 \, \sqrt {2} {\left (-i \, {\left (7 \, A + 9 \, C\right )} a^{4} - 36 i \, B a^{3} b - 18 i \, {\left (3 \, A + 5 \, C\right )} a^{2} b^{2} - 60 i \, B a b^{3} - 15 i \, {\left (A - C\right )} b^{4}\right )} \cos \left (d x + c\right ) {\rm weierstrassZeta}\left (-4, 0, {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) + i \, \sin \left (d x + c\right )\right )\right ) + 21 \, \sqrt {2} {\left (i \, {\left (7 \, A + 9 \, C\right )} a^{4} + 36 i \, B a^{3} b + 18 i \, {\left (3 \, A + 5 \, C\right )} a^{2} b^{2} + 60 i \, B a b^{3} + 15 i \, {\left (A - C\right )} b^{4}\right )} \cos \left (d x + c\right ) {\rm weierstrassZeta}\left (-4, 0, {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) - i \, \sin \left (d x + c\right )\right )\right ) - 2 \, {\left (35 \, A a^{4} \cos \left (d x + c\right )^{4} + 315 \, C b^{4} + 45 \, {\left (B a^{4} + 4 \, A a^{3} b\right )} \cos \left (d x + c\right )^{3} + 7 \, {\left ({\left (7 \, A + 9 \, C\right )} a^{4} + 36 \, B a^{3} b + 54 \, A a^{2} b^{2}\right )} \cos \left (d x + c\right )^{2} + 15 \, {\left (5 \, B a^{4} + 4 \, {\left (5 \, A + 7 \, C\right )} a^{3} b + 42 \, B a^{2} b^{2} + 28 \, A a b^{3}\right )} \cos \left (d x + c\right )\right )} \sqrt {\cos \left (d x + c\right )} \sin \left (d x + c\right )}{315 \, d \cos \left (d x + c\right )} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left ({\left (C b^{4} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )^{6} + {\left (4 \, C a b^{3} + B b^{4}\right )} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )^{5} + A a^{4} \cos \left (d x + c\right )^{4} + {\left (6 \, C a^{2} b^{2} + 4 \, B a b^{3} + A b^{4}\right )} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )^{4} + 2 \, {\left (2 \, C a^{3} b + 3 \, B a^{2} b^{2} + 2 \, A a b^{3}\right )} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )^{3} + {\left (C a^{4} + 4 \, B a^{3} b + 6 \, A a^{2} b^{2}\right )} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )^{2} + {\left (B a^{4} + 4 \, A a^{3} b\right )} \cos \left (d x + c\right )^{4} \sec \left (d x + c\right )\right )} \sqrt {\cos \left (d x + c\right )}, x\right ) \]