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: 306 + 2346 - 7752 + 7173

Output: -1461


Input: Consider Input: 397 + 1596 + 6102 + 2852 + 1239 + 3524 - 8019

Output: -6897


Input: Consider Input: 1744 + 4800 - 4688 + 2637 - 1656 - 4459 - 9618 + 4120


Output: 10608