Answer:
gf(-2) = 1570
Explanation:
A common thing that students do is find g(f) and then plug -2 which is not needed. So first work your way from the backside (f(-2) then whatever the answer plug in g( )) and find the answer.
So f(-2)= 5x^3 (just replace x with -2 or value in bracket)
f(-2)= 5*(-2)^3
f(-2)= -40
g(-40)= (-40)^2+(-40)+10
gf(-2) = 1570