(0,5x-2y)^3 = (0,5x)^3 - 3(0,5x)^2 2y + 3(0,5x)(-2y)^2 - (-2y)^= 0,125x^3 - 0,75x^2y + 1,5xy^2 - 8y^3
(1/3a-1/2b)^3 = (1/3a)^3 - 3(1/3a)^2 (1/2b) + 3(1/3a)(-1/2b)^2 - (-1/2b)^= 1/27a^3 - 1/18a^2b + 1/12ab^2 - 1/8b^3
(-2/5+5/3x)^3 = (-2/5)^3 - 3(-2/5)^2 (5/3x) + 3(-2/5)(5/3x)^2 - (5/3x)^= -8/125 + 24/125x - 40/125x^2 + 125/27x^3
(0,5x-2y)^3 = (0,5x)^3 - 3(0,5x)^2 2y + 3(0,5x)(-2y)^2 - (-2y)^
= 0,125x^3 - 0,75x^2y + 1,5xy^2 - 8y^3
(1/3a-1/2b)^3 = (1/3a)^3 - 3(1/3a)^2 (1/2b) + 3(1/3a)(-1/2b)^2 - (-1/2b)^
= 1/27a^3 - 1/18a^2b + 1/12ab^2 - 1/8b^3
(-2/5+5/3x)^3 = (-2/5)^3 - 3(-2/5)^2 (5/3x) + 3(-2/5)(5/3x)^2 - (5/3x)^
= -8/125 + 24/125x - 40/125x^2 + 125/27x^3