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: 8243 + 5509 - 2652 - 916 - 1636 + 9824
Example Output: -1886

Example Input: 4732 + 8674 - 6783 - 543 + 7814
Example Output:
-4430