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: 5299 - 8791 + 6861

Output: 7229


Input: Consider Input: 4287 + 3355 + 4251 + 7433 + 7069

Output: -17821


Input: Consider Input: 7740 + 2076 - 1033 - 3967


Output: 10664