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: 3970 # 8486 # 9402 # 8030 @ 4724 @ 8858
Example Output: -8366

Example Input: 877 # 7761 # 7154 # 4993 # 2712
Example Output: -21743

Example Input: 7934 @ 6076 @ 4023 @ 8596 # 931 # 3459 # 2477
Example Output:
19762