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.

6492 - 3901 + 3666 + 9196 - 3917 - 133
1581

5462 - 3916 + 9462 - 8867 - 7357
16140

4620 - 6907 - 9453 - 7879 + 7413

21446