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: 2603 + 1868 - 4242
Example Output: 4977

Example Input: 5299 - 8791 + 6861
Example Output: 7229

Example Input: 7457 - 9732 + 1691 + 2450 + 16 + 1610 + 1729
Example Output:
9693