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: 3586 # 8254 # 4130 # 5426
Example Output: -14224

Example Input: 7924 @ 8575 # 3974 @ 6720
Example Output: 19245

Example Input: 2407 @ 3087 @ 3501 # 7370 @ 2234 @ 3245 @ 3433
Example Output:
10537