4(a + 2) = 4a + 4 × 2 = 4a + 8
3(m - 5) = 3m - 3 × 5 = 3m - 15
(p - q) × 9 = 9(p - q) = 9p - 9q = 9p - 9q
12(a + b) = 12a + 12b = 12a + 12b
5(2m - 1) = 5 × 2m - 5 × 1 = 10m - 5 = 10m - 5
(3c + 5d) × 14 = 14(3c + 5d) = 14 × 3c + 14 × 5d = 42c + 70d = 42c + 70d