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: 6433 + 6891 + 2386 - 7923 - 2419 + 7641
Example Output: -143

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

Example Input: 4100 + 4500 + 5166 + 7442 + 3258
Example Output:
-16266