Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-2" was replaced by "^(-2)".

Step  1  :

Equation at the end of step  1  :

  36^-2

Step  2  :

Final result :

   1                                   
  ——— = 1.88168 • 10-6 
  312