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: 4899 + 5775 - 8386 + 4273

SOLUTION: 3237

PROBLEM: 5335 + 8307 + 4845 + 6853 - 9847 + 7289

SOLUTION: -12112

PROBLEM: 4477 + 7456 + 7038 + 7743 - 3359 - 3237 - 1022 + 3509 + 1425

SOLUTION:
-15076