We first have to do the operations in order. The classic mnemonic is "Please Excsue My Dear Aunt Sally". Taking the first letter of each workd, you get PEMDAS.
Parentheses, exponents, multiplication, division, addition, subtraction.
So looking at the equation, we peform the parentheses first (-3)3 which = -9.
So now we have -9 + 6^3/12. Now we perform the exponent. 6^3 is 6*6*6 qhich equals 216. So now we have -9 + 216/12
There is no multiplication so we do division; 216/12 = 18
So now we have -9 + 18 = 9
Negative 9 plus 18 equals 9
