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: 6729 # 1204 # 5514 # 8079
Example Output: -8068

Example Input: 6484 # 6042 @ 239 # 5161 # 7940 @ 2882 @ 8393 # 311 @ 6933
Example Output: 5477

Example Input: 4764 # 9568 # 9176 # 6920 @ 4095 # 1205 @ 6777 # 1671
Example Output:
-12904

