原式=[(x+2)/x(x+2)-(x-1)/(x-2)²]÷[(x²-4)/x]×(x-2)²=[x-(x-1)/(x-2)²]×[x/(x+2)(x-2)]×(x-2)²=[x-(x-1)/(x-2)²]×[x(x-2)/(x+2)]=x×[x(x-2)/(x+2)]-(x-1)/(x-2)²×[x(x-2...