Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "1.5" was replaced by "(15/10)".

Step  1  :

            3
 Simplify   —
            2

Equation at the end of step  1  :

   3
  (— • m) • g
   2

Step  2  :

Final result :

  3mg
  ———
   2