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3 (a + 5) = 3a + 15
8 (5 – x) = 40 – 8x
15 (c + d) = 15c + 15 d
-20 (f – g) = -20f + 20g
(a + b) 4 = 4a + 4b
-14a(a + b) = -14a2 – 14 b
(x – y) 18 = 18x – 18y
2a (3 + 2b) = 6a + 4b
20 (4a – 5) = 80a – 100
(3c + 5d)·(-4) = -12c – 20d
(2x + 3y) 8x = 16x2 + 24xy
(3m + 4n – 7p) ·(-6) = -18m – 24n + 42p
-5a (b + 3c – 6d + 2f) = -5ab – 15ac + 30ad – 10 af
(2a – 5b + 3c) 12 = 24a – 60b + 36c