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: 1731 # 9932 # 4056 # 2303
Example Output: -14560

Example Input: 3438 # 3865 # 956 # 3020 @ 2696
Example Output: -1707

Example Input: 7203 # 7459 @ 5894 @ 9657 @ 5336
Example Output:
20631