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.

Example Input: 1470 + 1395 + 3788 + 7517 + 2388 - 431 - 2393 + 4241 - 560
Example Output: -14475

Example Input: 2514 - 3539 - 8491 + 7351 - 1448
Example Output: 8641

Example Input: 1673 - 7768 + 9316 - 3439 - 6475 - 6113
Example Output:
16152