\[ \begin{array}{l} f(x)=4 x^{3}+6 x^{2}-3 x-4 \\ g(x)=4 x-3 \end{array} \] Find $(f-g)(x)$.

Step 1 ：Subtract the corresponding terms of the two functions: \( (f-g)(x) = (4x^3 + 6x^2 - 3x - 4) - (4x - 3) \)

Step 2 ：Simplify the expression: \( \boxed{(f-g)(x) = 4x^3 + 6x^2 - 7x - 1} \)