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.

Ex Input:
9806 + 7051 + 6703 + 4233 - 276

Ex Output:
-7905


Ex Input:
6245 + 6705 - 5181 + 7350 - 5051 - 8984 - 476 + 3773

Ex Output:
8109


Ex Input:
2982 + 9912 - 1386 + 7183 + 259 - 2370

Ex Output:

-10616