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: 3844 - 5783 + 7487
Example Output: 2140

Example Input: 9118 + 5545 - 3160 + 3672 - 3568 + 5997 + 205 + 7095
Example Output: -6668

Example Input: 5618 - 5417 + 162 - 7064 - 2214 + 8575
Example Output:
11576