(x-4xy/x+y +y)×(x+4xy/x-y - y)

СРОЧНО!!!1!! ПОМОГИТЕ ПОЖАЛУЙСТА!!!

(x+y)(x+y)-4xy)/(x+y))**(y-x)(y-x)-4xy)/(y-x)=(x²+2xy+y²-4xy)*(y²-2xy+x²+4xy))/(y+x)(x-y)=(x²-2xy+y²)(x²+4xy+y²)//(x-y)(y+x)==(x-y)²(x+y)²//(x-y)(x+y)=(x-y)(x+y)