Which expression represents the product x2−y2x+y⋅x2+xyx−y\frac{x^2-y^2}{x+y} \cdot \frac{x^2+xy}{x-y}x+yx2−y2⋅x−yx2+xy?
x(x+y)x(x+y)x(x+y)
x(x−y)x(x-y)x(x−y)
x2x^2x2
x2+xyx^2+xyx2+xy