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: 8901 - 4785 + 1969 + 5985 + 517 + 5651 + 170
Example Output: -606

Example Input: 5409 - 5550 + 3864 - 5911 + 5222
Example Output: 7784

Example Input: 3104 - 8883 - 6715 + 6926
Example Output:
11776