What does m divided by 3 minus 3 less than negative 6
Do you mean
What IS m divided by 3 minus 3 less than negative 6
it is
$$\\-6-[\frac{m}{3}-3]\\\\ =-6-\frac{m}{3}+3\\\\ =-6+3-\frac{m}{3}\\\\ -3-\frac{m}{3}\\\\$$