2x+2分之x+2=(x+2)/2(x+1)=2(x²-4)/(4(x+1)(x-2)
,x²-x-2分之x=x/(x-2)(x+1)=4x/4(x+1)(x-2)
,4x-8分之3=3/4(x-2)=3(x+1)/4(x+1)(x-2)