(x+1)(x+2)/(x²+4x+4)×(3x+6)/(2x²-8)÷1/(x²-4)
=(x+1)(x+2)/(x+2)²×3(x+2)/2(x+2)(x-2)×(x+2)(x-2)
=3(x+1)/2
3(x+1)/2