原式=[(a+2)/a(a-2)-8/(a+2)(a-2)]×[a/(a-2)]={[(a+2)²-8a]/a(a+2)(a-2)]}×[a/(a-2)]=[(a²+4a+4-8a)/a(a+2)(a-2)]×[a/(a-2)]=[(a²-4a+4)/a(a+2)(a-2)]×[a/(a-2)]=[(a-2)²/a(a+2)(a-2)]×[a/...