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.

Input: Consider Input: 7555 + 8285 + 7132 + 9363 - 3515

Output: -13710


Input: Consider Input: 5299 - 8968 + 5239 + 1119

Output: 7909


Input: Consider Input: 8622 - 2825 + 1409 - 593 - 5009 + 3092 + 9780


Output: 2768