Simplify: (x2+3x+2)(x+1)−1(x^2 + 3x + 2)(x + 1)^{-1}(x2+3x+2)(x+1)−1 for x≠−1x \neq -1x=−1.
x+2x + 2x+2
x+1x + 1x+1
x2+2x^2 + 2x2+2
x+3x + 3x+3