{(x+2y)²—(x-2y)²-(x+2y)(x-2y)-4y²}÷2x求x=2014 y=-2014\1

问题描述:

{(x+2y)²—(x-2y)²-(x+2y)(x-2y)-4y²}÷2x求
x=2014 y=-2014\1