(342:18+81·11):35-5

To solve this expression, we need to follow the order of operations, which is parentheses, multiplication and division (from left to right), and finally addition and subtraction (from left to right).

Let's simplify the expression step by step:

1. Start with the parentheses: (342:18 + 81 · 11) : 35 - 5

   Inside the parentheses, we have division and multiplication. So we need to simplify that first.

2. Evaluate the division 342 : 18: 342 ÷ 18 = 19

   Now we have: (19 + 81 · 11) : 35 - 5

3. Evaluate the multiplication 81 · 11: 81 × 11 = 891

   Now we have: (19 + 891) : 35 - 5

4. Evaluate the addition 19 + 891: 19 + 891 = 910

   Now we have: 910 : 35 - 5

5. Evaluate the division 910 : 35: 910 ÷ 35 = 26

   Now we have: 26 - 5

6. Finally, evaluate the subtraction 26 - 5: 26 - 5 = 21

Thus, the final result is 21.