б) 2c(a-3b+4) = 2ca - 6cb + 8c
в) (4x-1)(2x-3) = 8x^2 - 12x - 2x + 3 = 8x^2 - 14x + 3
г) (a+2)(a^2 - a - 3) = a^3 - a^2 - 3a + 2a^2 - 2a - 6 = a^3 + a^2 - 5a - 6
д) (4ab^2 - 6a^2b) / 2ab = 2b - 3a
б) 2c(a-3b+4) = 2ca - 6cb + 8c
в) (4x-1)(2x-3) = 8x^2 - 12x - 2x + 3 = 8x^2 - 14x + 3
г) (a+2)(a^2 - a - 3) = a^3 - a^2 - 3a + 2a^2 - 2a - 6 = a^3 + a^2 - 5a - 6
д) (4ab^2 - 6a^2b) / 2ab = 2b - 3a