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

Example Input: 1999 # 5055 @ 6736 # 8829 @ 7010 # 2968 # 259 @ 5904
Example Output: 4538

Example Input: 2285 @ 1970 @ 4720
Example Output: 8975

Example Input: 456 # 2263 # 5502 # 8470
Example Output:
-15779