In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411
1115

2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232
-797

4558 + 6469 + 1154

-3065