If f′(x)=3x2+2xf'(x) = 3x^2 + 2xf′(x)=3x2+2x and f(1)=5f(1) = 5f(1)=5, find f(x)f(x)f(x).
x3+x2+3x^3 + x^2 + 3x3+x2+3
x3+x2+5x^3 + x^2 + 5x3+x2+5
x3+x2+1x^3 + x^2 + 1x3+x2+1
6x+26x + 26x+2