1. If f(x)=3(root x)*(x^3-7(root x) +7)

find f'(x) and f'(4)

2. If f(x)=9x+2 / x^2+2x-3, find the derivative f'(x).

3. G(x)=(3x^2-2)(x+2)^2 / (10x^2+8x+2)

Find G'(2)

4. f(x)=x^8 h(x)

h(-1)=3

h'(-1)=6

Calculate f(-1)

I attempted all of these, thought I was doing everything correct but apparently I was not and now im stuck. Any help is greatly appreciated