f(x) = x^3 - 3x^2 - x +3

I need to find the slope of the tangent line at x=2 using lim as x->2

(f(x) - f(2)) / (x-2)

I cannot for the life of me factor the equation in order to cancel out the x - 2. I feel pretty dumb, but I'm tired, and I need to do this for a write-up.