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: 643 @ 9262 # 6489 @ 1803 @ 6271
Example Output: 11490

Example Input: 7686 @ 8753 @ 1402 # 3760 # 9121 @ 5705 @ 9002
Example Output: 19667

Example Input: 4224 # 4013 @ 8299 # 8026 # 4816 # 7018
Example Output:
-11350