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: 7539 # 9710 # 800 # 5609
Example Output: -8580

Example Input: 8842 @ 3530 @ 7537
Example Output: 19909

Example Input: 877 # 7572 @ 1298
Example Output:
-5397