23 - 22 + 1234 - 345 x 3
1. 345 x 3 is 1,035. Your problem is now 23 - 22 + 1234 - 1035.
2. Subtract 22 from 23. The sum is 1. Your problem is now 1 + 1234 - 1035.
3. Add one to 1234, which is 1235. Your problem is 1235 - 1035.
4. Subtract 1035 from 1235 on your own.