f(x)=(x^2+2x+3)^4, find f'(x).

what rule do we use and can some please show me the steps

chain rule

y' = 4(x^2 + 2x + 3)^3 * (2x+2)
etc.

in general if
y = a(junk)^n
then
y' = an(junk)^(n-1) * (junk)'