(2a-b)(2a+b) = 4a^2 - b^2
(y-2)^3 = y^3 - 6y^2 + 12y - 8
(c+2)(c^2 - 2c + 4) = c^3 + 2c^2 - 2c^2 - 4c + 4c + 8 = c^3 + 8
(x+5)^2 = x^2 + 10x + 25
(n+3)^3 = n^3 + 9n^2 + 27n + 27
(2a-b)(2a+b) = 4a^2 - b^2
(y-2)^3 = y^3 - 6y^2 + 12y - 8
(c+2)(c^2 - 2c + 4) = c^3 + 2c^2 - 2c^2 - 4c + 4c + 8 = c^3 + 8
(x+5)^2 = x^2 + 10x + 25
(n+3)^3 = n^3 + 9n^2 + 27n + 27