If the PEMDAS rule is broken, 3 could be added to 49 before multiplying by the difference of 4 and 9.
The notation of misuse would be [(49+3)(4-9)]/17 which does not evaluate to 2, but comes to -260/17.
Another misuse would be 49+3(4-9)/17 which evaluates to 49-15/17=818/17.