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: 1231 + 6657 - 8263

SOLUTION: 2837

PROBLEM: 7671 - 2300 - 9650 - 6692 + 7656 + 4940 - 2878 - 5602 + 7222

SOLUTION: 14975

PROBLEM: 91 + 5184 - 2180

SOLUTION:
-2913