\[ \int \frac {a g-c g x^4}{\left (a+b x^2+c x^4\right )^{3/2}} \, dx \]
Optimal antiderivative \[ \frac {g x}{\sqrt {c \,x^{4}+b \,x^{2}+a}} \]
command
Integrate[(a*g - c*g*x^4)/(a + b*x^2 + c*x^4)^(3/2),x]
Mathematica 13.1 output
\[ \frac {g x}{\sqrt {a+b x^2+c x^4}} \]
Mathematica 12.3 output
\[ \text {\$Aborted} \]________________________________________________________________________________________