Вычислим:
1) $$3010 – 5614 : 7 + 9042 = 3010 - 802 + 9042 = 2208 + 9042 = 11250$$
2) $$(90 – 42 : 3 \cdot 2) : 2 = (90 - 14 \cdot 2) : 2 = (90 - 28) : 2 = 62 : 2 = 31$$
3) $$(40 179 – 15 395 : 5) \cdot 4 = (40179 - 3079) \cdot 4 = 37100 \cdot 4 = 148400$$
4) $$15 \cdot (54 : 3 – 84 : 7) = 15 \cdot (18 - 12) = 15 \cdot 6 = 90$$
Ответ: 1) 11250; 2) 31; 3) 148400; 4) 90.