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

8398 - 1163 + 8396 + 4440 + 9289
-12564

3976 + 4589 + 158

-771