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

Q: 6203 # 8978 # 1139 @ 240 # 4716

A: -8390
****
Q: 6148 @ 1077 @ 5914 # 245 @ 5862 @ 8792 # 9099

A: 18449
****
Q: 7753 @ 4095 @ 8415 @ 2673 @ 4284 # 2704 @ 3072 @ 2457

A:
30045
****