(2a+3b)^3 = (2a+3b)(2a+3b)(2a+3b) = 8a^3 + 12a^2b + 12ab^2 + 27b^3
(x-2y)^3 = (x-2y)(x-2y)(x-2y) = x^3 - 6x^2y + 12xy^2 - 8y^3
(2a+3b)^3 = (2a+3b)(2a+3b)(2a+3b) = 8a^3 + 12a^2b + 12ab^2 + 27b^3
(x-2y)^3 = (x-2y)(x-2y)(x-2y) = x^3 - 6x^2y + 12xy^2 - 8y^3