#y = (3x + 4)^3 - (2x + 3)^2#
#color(crimson)((a + b)^3 = a^3 + b^3 + 3a^2b + 3ab^2#, identity
#color(purple)((x + y)^2 = x-^2 + 2xy + y^2#, identity
#y = 27x^3 + 64 + 108x^2 + 48x - 4x^2 - 24x - 9#
#color(maroon)(y = 27x^3 + 104x^2 + 24x + 55# is the standard form.