Factorize each of the following expressions : `x^2+2x y+y^2-a^2+2a b-b^2`
Factorize each of the following expressions : `x^2+2x y+y^2-a^2+2a b-b^2`
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Factorize each of the following expressions : `x^2+2x y+y^2-a^2+2a b-b^2`