1) (2+y)(4-2y+y^2) = 8 - 4y + 2y - 2y^2 + 4y^2 - 2y^3 = -2y^3 + 2y^2 - 2y + 8
2) (8+a)^3 = 512 + 38^2a + 38a^2 + a^3 = 512 + 192a + 24a^2 + a^3
3) (1 - 3x)^3 = 1 - 33x + 3(3x)^2 - (3x)^3 = 1 - 9x + 27x^2 - 27x^3
1) (2+y)(4-2y+y^2) = 8 - 4y + 2y - 2y^2 + 4y^2 - 2y^3 = -2y^3 + 2y^2 - 2y + 8
2) (8+a)^3 = 512 + 38^2a + 38a^2 + a^3 = 512 + 192a + 24a^2 + a^3
3) (1 - 3x)^3 = 1 - 33x + 3(3x)^2 - (3x)^3 = 1 - 9x + 27x^2 - 27x^3