Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x9"   was replaced by   "x^9". 

Step  1  :

             1
 Simplify   ——
            15

Equation at the end of step  1  :

   1
  —— • x90
  15

Step  2  :

Final result :

  x90
  ———
  15