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: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183

SOLUTION: -12917

PROBLEM: 4117 - 7011 - 9534 - 3901 - 9537 + 6979

SOLUTION: 27121

PROBLEM: 4521 + 6223 + 3611 - 5498 - 4477 - 2195 + 2818 + 6173 - 6613

SOLUTION:
4479