\[ \int \frac {1}{x^6 \left (8 c-d x^3\right ) \sqrt {c+d x^3}} \, dx \]
Optimal antiderivative \[ -\frac {F_{1}\left (-\frac {5}{3}, \frac {1}{2}, 1, -\frac {2}{3}, -\frac {d \,x^{3}}{c}, \frac {d \,x^{3}}{8 c}\right ) \sqrt {1+\frac {d \,x^{3}}{c}}}{40 c \,x^{5} \sqrt {d \,x^{3}+c}} \]
command
integrate(1/x^6/(-d*x^3+8*c)/(d*x^3+c)^(1/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \text {output too large to display} \]
Fricas 1.3.7 via sagemath 9.3 output \[ {\rm integral}\left (-\frac {\sqrt {d x^{3} + c}}{d^{2} x^{12} - 7 \, c d x^{9} - 8 \, c^{2} x^{6}}, x\right ) \]