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: 9781 # 2797 # 2134
Example Output: 4850

Example Input: 4616 @ 2249 # 272 @ 618 # 4242 @ 6599 @ 8683 @ 1628 # 7090
Example Output: 12789

Example Input: 3730 @ 7896 @ 6897 # 6346 # 2461 @ 462 @ 3581 # 375 # 286
Example Output:
13098