Did I solve these right?

Question

1. f(x)= -3x + 1
g(x)= -4x^2 + x + 2
Find g(f(x) )
-4(-3x+1)^2+(-3x+1)+2
-4(-3x+1)^2-3x+1+2
3-3x-4(-3x+1)^2
3-3x-4+24x-36x^2
=21x-36^2-1

2.f(x)= -2x + 1
g(x)= -3x^2 -x -1
Find (g /f)(x)
-3x^2-x-1/-2x+1

3. f(x)=-x +2
g(x)= -4x2 + x + 5
Find (f o g)(x)
f(-4x^2+x+5)
-(-4x^2+x+5)+2
=4x^2-x-5+5
=4x^2-x

Answer 1

=21x-36^2-1
You mean
-36 x^2 + 21 x - 1

Answer 2

3.

-4x^2 + x + 5 + 2

= -4 x^2 + x + 7