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: 2763 @ 869 # 8299
Example Output: -4667

Example Input: 3347 # 2950 @ 6671 @ 4670 # 7283
Example Output: 4455

Example Input: 353 @ 9911 # 8686 @ 3017 @ 7420
Example Output:
12015

