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.

Q: 3123 + 9519 - 2864 + 9440 - 756 + 252

A: -12468
****
Q: 3709 + 206 - 4363 + 3129 + 2506

A: 2231
****
Q: 4437 - 8247 - 943 - 6684 + 7670

A:
12641
****