x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.

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x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙

x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.

x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.