You will be given a definition of a task first, then some input of the task.
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

6939 @ 1181 @ 3187 # 5428 @ 5253 @ 8306 @ 7235 @ 138 @ 2167
Output:
28978