Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "5.5" was replaced by "(55/10)".

Step  1  :

            11
 Simplify   ——
            2 

Equation at the end of step  1  :

  11
  —— • 12
  2 

Step  2  :

Final result :

  66