## Calculus, 10th Edition (Anton)

$$F(g(x),h(y))=x^3e^{3x^3y+x^3}$$
In $F(x,y)$ for the first argument use $g(x)=x^3$ and for the second use $h(y)=3y+1$: $$F(g(x),h(y))=F(x^3,3y+1)=x^3e^{x^3\cdot(3y+1)}=x^3e^{3x^3y+x^3}$$