(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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Huge expansion
Forgetting to simplify
Running out of space
so if 3-2=1
then x-y=z
then 2=3-1
so y=x-z
That 0 looks a lot like a 6
mental gymnastics
Wolfram Alpha
x=x
Actually getting the correct answer
Misreading + as x
Order of operations skill issue
Checking your answer and getting a really weird result
Giving up and using trial and error
Doing the problem in the most convoluted way possible