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: 1737 + 1422 + 9162 - 7244 + 6133

Output: -7736


Input: Consider Input: 8737 - 2978 - 6717

Output: 18432


Input: Consider Input: 5425 + 1740 + 5425 - 8068 + 9530 + 1411 - 5497 + 7157


Output: -6273