(2-а)³ = 8 - 12a + 6a² - a³
(3х-2у)³ = 27x³ - 54x²y + 36xy² - 8y³
(2-a)³= 8-12a+6a²-a³
(3x-2y)³= 27x³-54x²y+36xy²-8y³