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: 1559 # 9981 # 6881
Example Output: -15303

Example Input: 427 # 7974 # 7564 @ 2404 # 4955 # 1239 # 1518 @ 906
Example Output: -19513

Example Input: 5392 @ 4651 @ 3231 @ 1380
Example Output:
14654

