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: 8602 - 1293 - 8063 - 4529 + 453 - 6407
Example Output: 28441

Example Input: 4486 + 7884 - 172 + 2615
Example Output: -5841

Example Input: 9039 + 4996 + 845 - 5409
Example Output:
8607