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.

8901 - 4785 + 1969 + 5985 + 517 + 5651 + 170
-606

9549 - 507 + 659 + 3404 - 9243
15236

8977 + 7564 + 7521 + 3788 + 6898 - 1070

-15724