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: 2738 # 5562 @ 4529 @ 5438 @ 1799
Example Output: 8942

Example Input: 9490 @ 4247 # 4443 # 1055 @ 1979 # 2000 @ 383 # 8777
Example Output:
-176