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: 9835 @ 3285 # 8713 # 3066
Example Output: 1341

Example Input: 7534 @ 7329 # 2862 # 947 @ 8590 @ 4064
Example Output: 23708

Example Input: 2580 # 1711 @ 6917 # 8647
Example Output:
-861