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: 7427 + 8795 - 4104 + 7720 - 6667

Output: 1683


Input: Consider Input: 3782 + 4127 - 1265 - 1395 + 2430 + 6990 + 8573 + 8170

Output: -23848


Input: Consider Input: 3040 - 5501 - 7050 + 4977 + 98 + 3087


Output: 7429