TASK DEFINITION: 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.
PROBLEM: 3881 + 3747 + 6493 - 7538

SOLUTION: 1179

PROBLEM: 6667 - 31 + 1584 - 1542 - 6475 + 9319 + 2509 - 1895

SOLUTION: 3198

PROBLEM: 6947 - 7387 + 3796 - 3145 + 893 - 3823 + 3949 - 3110

SOLUTION:
15774