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.

6738 - 471 + 8724
-1515

6245 + 6705 - 5181 + 7350 - 5051 - 8984 - 476 + 3773
8109

4397 - 8340 + 6322 + 4315 - 7894 - 4413 + 6379 + 6717 + 2228

-917