Definition: In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer
Input: 6497 # 5786 # 6968 @ 3704 # 7177 @ 3234 @ 3112 @ 1423
Output:
-1961