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: 8171 + 8357 + 171 - 3129 - 6929

SOLUTION: 9701

PROBLEM: 4899 + 5775 - 8386 + 4273

SOLUTION: 3237

PROBLEM: 4049 + 1521 - 2371 + 7116 - 3042 + 4875 + 2681

SOLUTION:
-6731