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: 7272 + 8958 - 7231 + 6616

Output: -1071


Input: Consider Input: 6042 + 4328 - 5171 + 23 + 4485 + 8072 + 4298

Output: -9993


Input: Consider Input: 1767 + 7166 + 1543 + 1185 + 9966 - 6628


Output: -11465