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: 6628 @ 7709 @ 528 @ 8813
Example Output: 23678

Example Input: 9407 @ 4324 # 2220 # 8668 @ 1606 @ 4059
Example Output: 8508

Example Input: 3359 @ 5445 # 8685 # 9638 # 4845 # 6194 @ 5167
Example Output:
-15391