Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "4.5" was replaced by "(45/10)".

Step  1  :

            9
 Simplify   —
            2

Equation at the end of step  1  :

       9
  0 -  —
       2

Step  2  :

Final result :

  -9            
  —— = -4.50000 
  2