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: 4291 + 2761 - 4339 + 8922
Example Output: -3053

Example Input: 4062 - 644 + 187 - 4501 + 1736 - 230
Example Output: 7514

Example Input: 1047 - 9127 + 7315
Example Output:
2859