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.

2837 + 8737 + 9015 - 7647 - 1903 - 3427 - 2034 - 3680 - 8565
12341

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

6259 + 7353 + 8931 + 3771 + 854 - 3822

-10828