-6 +12 over 3-6= 6/9=-3 is this right

-6 +12 over 3-6 = 6/-3 = -2

(-6 +12) over (3-6) = 6/-3 = -2

-6 +(12 over 3)-6 = -6 + 4 - 6 = -8

What is that folks have against writing fractions using the virgule? 12/6
No need to pretend you're on a CB - over.

Or did you use the word "over" to mean that you wanted the two expressions with numbers to be evaluated first? Well, that's what parentheses are for.