\[ \int \frac {(a+a \cos (c+d x))^3 \left (A+B \cos (c+d x)+C \cos ^2(c+d x)\right )}{\sec ^{\frac {3}{2}}(c+d x)} \, dx \]
Optimal antiderivative \[ \frac {20 a^{3} \left (286 A +273 B +236 C \right ) \sin \left (d x +c \right )}{9009 d \sec \left (d x +c \right )^{\frac {5}{2}}}+\frac {2 C \left (a +a \cos \left (d x +c \right )\right )^{3} \sin \left (d x +c \right )}{13 d \sec \left (d x +c \right )^{\frac {5}{2}}}+\frac {2 \left (13 B +6 C \right ) \left (a^{2}+a^{2} \cos \left (d x +c \right )\right )^{2} \sin \left (d x +c \right )}{143 a d \sec \left (d x +c \right )^{\frac {5}{2}}}+\frac {2 \left (143 A +195 B +145 C \right ) \left (a^{3}+a^{3} \cos \left (d x +c \right )\right ) \sin \left (d x +c \right )}{1287 d \sec \left (d x +c \right )^{\frac {5}{2}}}+\frac {4 a^{3} \left (221 A +195 B +175 C \right ) \sin \left (d x +c \right )}{585 d \sec \left (d x +c \right )^{\frac {3}{2}}}+\frac {4 a^{3} \left (121 A +105 B +95 C \right ) \sin \left (d x +c \right )}{231 d \sqrt {\sec \left (d x +c \right )}}+\frac {4 a^{3} \left (221 A +195 B +175 C \right ) \sqrt {\frac {\cos \left (d x +c \right )}{2}+\frac {1}{2}}\, \EllipticE \left (\sin \left (\frac {d x}{2}+\frac {c}{2}\right ), \sqrt {2}\right ) \left (\sqrt {\cos }\left (d x +c \right )\right ) \left (\sqrt {\sec }\left (d x +c \right )\right )}{195 \cos \left (\frac {d x}{2}+\frac {c}{2}\right ) d}+\frac {4 a^{3} \left (121 A +105 B +95 C \right ) \sqrt {\frac {\cos \left (d x +c \right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (\frac {d x}{2}+\frac {c}{2}\right ), \sqrt {2}\right ) \left (\sqrt {\cos }\left (d x +c \right )\right ) \left (\sqrt {\sec }\left (d x +c \right )\right )}{231 \cos \left (\frac {d x}{2}+\frac {c}{2}\right ) d} \]
command
integrate((a+a*cos(d*x+c))^3*(A+B*cos(d*x+c)+C*cos(d*x+c)^2)/sec(d*x+c)^(3/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ -\frac {2 \, {\left (195 i \, \sqrt {2} {\left (121 \, A + 105 \, B + 95 \, C\right )} a^{3} {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) + i \, \sin \left (d x + c\right )\right ) - 195 i \, \sqrt {2} {\left (121 \, A + 105 \, B + 95 \, C\right )} a^{3} {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) - i \, \sin \left (d x + c\right )\right ) - 231 i \, \sqrt {2} {\left (221 \, A + 195 \, B + 175 \, C\right )} a^{3} {\rm weierstrassZeta}\left (-4, 0, {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) + i \, \sin \left (d x + c\right )\right )\right ) + 231 i \, \sqrt {2} {\left (221 \, A + 195 \, B + 175 \, C\right )} a^{3} {\rm weierstrassZeta}\left (-4, 0, {\rm weierstrassPInverse}\left (-4, 0, \cos \left (d x + c\right ) - i \, \sin \left (d x + c\right )\right )\right ) - \frac {{\left (3465 \, C a^{3} \cos \left (d x + c\right )^{6} + 4095 \, {\left (B + 3 \, C\right )} a^{3} \cos \left (d x + c\right )^{5} + 385 \, {\left (13 \, A + 39 \, B + 50 \, C\right )} a^{3} \cos \left (d x + c\right )^{4} + 585 \, {\left (33 \, A + 42 \, B + 38 \, C\right )} a^{3} \cos \left (d x + c\right )^{3} + 154 \, {\left (221 \, A + 195 \, B + 175 \, C\right )} a^{3} \cos \left (d x + c\right )^{2} + 390 \, {\left (121 \, A + 105 \, B + 95 \, C\right )} a^{3} \cos \left (d x + c\right )\right )} \sin \left (d x + c\right )}{\sqrt {\cos \left (d x + c\right )}}\right )}}{45045 \, d} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (\frac {C a^{3} \cos \left (d x + c\right )^{5} + {\left (B + 3 \, C\right )} a^{3} \cos \left (d x + c\right )^{4} + {\left (A + 3 \, B + 3 \, C\right )} a^{3} \cos \left (d x + c\right )^{3} + {\left (3 \, A + 3 \, B + C\right )} a^{3} \cos \left (d x + c\right )^{2} + {\left (3 \, A + B\right )} a^{3} \cos \left (d x + c\right ) + A a^{3}}{\sec \left (d x + c\right )^{\frac {3}{2}}}, x\right ) \]