(а + b)³ = a³ + 3a²b + 3ab² + b³
(a - b)³ = a³ - 3a²b + 3ab² - b³
1) (2 + x)³ = 2³ + 3 × 2² × x + 3 × 2 × x² + x³ = 8 + 12x + 6x² + x³
2) (a - 2)³ = a³ - 3a² × 2 + 3a × 2² - 2³ = a³ - 6a² + 12a - 8
3) (5 - b)³ = 5³ - 3 × 5² × b + 3 × 5 × b² - b³ = 125 - 75b + 15b² - b³
4) (y + 3)³ = y³ + 3y² × 3 + 3y × 3² + 3³ = y³ + 9y² + 27y + 27