\[ \int \frac {c+d x+e x^2+f x^3}{\left (a-b x^4\right )^3} \, dx \]
Optimal antiderivative \[ \frac {x \left (5 e \,x^{2}+6 d x +7 c \right )}{32 a^{2} \left (-b \,x^{4}+a \right )}+\frac {a f +b x \left (e \,x^{2}+d x +c \right )}{8 a b \left (-b \,x^{4}+a \right )^{2}}+\frac {3 d \arctanh \left (\frac {x^{2} \sqrt {b}}{\sqrt {a}}\right )}{16 a^{\frac {5}{2}} \sqrt {b}}+\frac {\arctan \left (\frac {b^{\frac {1}{4}} x}{a^{\frac {1}{4}}}\right ) \left (-5 e \sqrt {a}+21 c \sqrt {b}\right )}{64 a^{\frac {11}{4}} b^{\frac {3}{4}}}+\frac {\arctanh \left (\frac {b^{\frac {1}{4}} x}{a^{\frac {1}{4}}}\right ) \left (5 e \sqrt {a}+21 c \sqrt {b}\right )}{64 a^{\frac {11}{4}} b^{\frac {3}{4}}} \]
command
integrate((f*x^3+e*x^2+d*x+c)/(-b*x^4+a)^3,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 \[ \text {Timed out} \]