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: 6738 - 471 + 8724

Output: -1515


Input: Consider Input: 5360 + 7507 - 3329 + 6345 - 9328 + 3114

Output: 1051


Input: Consider Input: 2110 - 2042 + 5765 + 3529 + 9809 + 4064


Output: -19015