计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2有人帮我算一下没.
问题描述：
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
有人帮我算一下没.
答
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
有人帮我算一下没.