Step 1 :\( (f \circ g)(x) = f(g(x)) = f(2x^2 - 7x - 4) \)
Step 2 :\( (f \circ g)(x) = (2x^2 - 7x - 4) + 4 \)
Step 3 :\( (f \circ g)(x) = 2x^2 - 7x \)
Step 4 :\( (g \circ f)(x) = g(f(x)) = g(x+4) \)
Step 5 :\( (g \circ f)(x) = 2(x+4)^2 - 7(x+4) - 4 \)
Step 6 :\( (g \circ f)(x) = 2x^2 - 3x - 12 \)