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: 9776 + 5760 + 5961 - 1401 - 1368

Output: 824


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


Output: -9993