Which is the correct expansion of (x−y)3(x - y)^3(x−y)3?
x3−y3x^3 - y^3x3−y3
x3−3x2y+3xy2−y3x^3 - 3x^2y + 3xy^2 - y^3x3−3x2y+3xy2−y3
x3+3x2y−3xy2−y3x^3 + 3x^2y - 3xy^2 - y^3x3+3x2y−3xy2−y3
x3−3x2y−3xy2+y3x^3 - 3x^2y - 3xy^2 + y^3x3−3x2y−3xy2+y3