First simplify, then evaluate: (6xyx + 3yxy3) − (4yxy + 36xy), where x = 32, y = 27

First simplify, then evaluate: (6xyx + 3yxy3) − (4yxy + 36xy), where x = 32, y = 27

The original formula = 6xy + 3xy-4xy-6xy = - XY, when x = 32, y = 27, the original formula = - 32 · 27 = - 922