$$F(x) \frac{ 2 { x }^{ 2 } -3 }{ { x }^{ 3 } +3 { x }^{ 2 } +3x+1 }$$
$\frac{Fx\left(2x^{2}-3\right)}{\left(x+1\right)^{3}}$
$\frac{2Fx^{3}-3Fx}{x^{3}+3x^{2}+3x+1}$
