x平方+4x+4分之（x+1）（x+2）乘2x平方减8分之3x加6除以x平方减4分之1,其中x等于5,先化简,再求值.过程要详细哦 !x平方减4,后面有个逗号。

原式＝(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(5+1)/2
＝9

(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(x²-4)×(x²-4)
=3(x+1)/2
∵x=5
∴3(x+1)/2=3(5+1)/2=9

(x+1)(x+2)/(x²+4x+4)×(3x+6)/(2x²-8)×6÷1/(x²-4)
=(x+1)(x+2)/(x+2)²×2(x+2)/2(x+2)(x-2)×6×(x+2)(x-2)
=6(x+1)
=6(5+1)
=36