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: 4956 # 4259 # 3459
Example Output: -2762

Example Input: 2036 # 2136 @ 2740 # 8018 # 8379 @ 5952 # 3539 # 1201 # 5870
Example Output: -18415

Example Input: 7020 # 499 @ 3304 # 3502 # 907 @ 8217
Example Output:
13633