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

SOLUTION: 12341

PROBLEM: 9467 + 7102 - 1964

SOLUTION: 4329

PROBLEM: 1510 + 8525 + 7732 - 8314

SOLUTION:
-6433