2) 499812 +35988390 - 98898;

2) 49981 ⋅ 2 + 3 ⋅ 5 ⋅ 988 ⋅ 390 - 98898

Выполним действия по порядку:

1. 49981 ⋅ 2 = 99962
2. 3 ⋅ 5 = 15
3. 15 ⋅ 988 = 14820
4. 14820 ⋅ 390 = 5789800
5. 99962 + 5779800 = 5879762
6. 5879762 - 98898 = 5780864

Ответ: 5780864