where do the parenthesis go?
I myself would rearrange the problem.
But I also think that the parenthesis go like this
Asuming that the x is multiplying not a variable it would be 5+(4x12)-1 or 4+(4x12)
(12+4-1) x 5 =75
You already doing this in fifth grade. I didn't start those problems until 7th grade and I am in 9th grade now and still learning those problems.