4) 37-46-18-37+37-72.

4) 37 ⋅ 46 - 18 ⋅ 37 + 37 ⋅ 72 = 37 ⋅ (46 - 18 + 72) = 37 ⋅ (28 + 72) = 37 ⋅ 100 = 3700

Ответ: 3700