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: 8671 + 9945 - 8465 - 5276 + 1447
Example Output: 11020

Example Input: 3129 - 7101 - 6763 + 9310 + 4977
Example Output:
2706