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.

2181 + 397 + 8824 - 2945 + 612 + 9971 + 1036 - 7693
-8021

2875 - 138 + 917 + 4037 - 6642
4701

3358 + 704 + 9456 + 2022 + 7780 + 6741 - 730 + 5843 - 7406

-21052