Помогите!Очень срочно!

Решите задачу:

$1) \: 2(x - 5) = 2 \times x - 2 \times 5 = 2x - 10 \\ \\ 2) \: 3(8 + a) = 3 \times 8 + 3 \times a = 24 + 3a \\ \\ 3) \: 5(4 - 6y) = 5 \times 4 - 5 \times 6y = 20 - 30y \\ \\ 4) \: 10(2b - 1) = 10 \times 2b - 10 = 20b - 10 \\ \\ 5) \: 4(3 + 3x - m) = 4 \times 3 + 4 \times 3x - 4 \times m = 12 + 12x - 4m \\ \\ 6) \: 6(5y - 2b + 10) = 6 \times 5y - 6 \times 2b + 6 \times 10 = 30y - 12b + 60 \\ \\ 7) \: 8(3x + a - 4) = 8 \times 3x + 8a - 8 \times 4 = 24x + 8a - 32$