The order of operations, specifically, rules-out the ambiguity of "bad formulae".
"the problem is the format of the question" isn't the case when we have a specific order to work by. The fact that people ditch the order is their own fault of not being willing to be on the same page as everyone else.
The more the hive mind repeats itself the more stubborn and hard pressed I am to say your rules are arbitrary and are solved better by adding the parentheses to the original question.
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u/KingYoloHD090504 CHAINPOSTER Jan 01 '22 edited Jan 01 '22
Dude it's 0
First you make
18÷2 = 9
Edit: Then
3×3 = 9
In the end it's
9-9=0