(x+y)²+2(x+y)+1

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(x+y)²+2(x+y)+1(x+y)²+2(x+y)+1(x+y)²+2(x+y)+1 

(x+y)²+2(x+y)+1
(x+y)²+2(x+y)+1

(x+y)²+2(x+y)+1