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: 2377 @ 4500 # 8359 @ 9946 # 9011
Example Output: -547

Example Input: 1614 @ 5794 # 2578
Example Output: 4830

Example Input: 3615 @ 7429 @ 6810 # 207 @ 1232 # 5621 @ 6745
Example Output:
20003