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.

2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111
-12343

6433 + 6891 + 2386 - 7923 - 2419 + 7641
-143

5398 + 9842 + 4345 + 2142 - 2539 + 611

-9003