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: 7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572
Example Output: -2011

Example Input: 1229 - 4354 + 912 - 1766
Example Output: 6437

Example Input: 1741 + 3590 - 4704 - 8807 - 5756 + 4662
Example Output:
12756