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: 992 # 6304 @ 9489 # 6814 # 5448 @ 4565
Example Output: -3520

Example Input: 1774 # 6033 # 3757 @ 3570 @ 6463 # 5537
Example Output: -3520

Example Input: 2234 # 4803 @ 3505 @ 2022 # 2430
Example Output:
528