Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

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

Step  1  :

 1.1     12 = 22•3

(12)^-1 = (2²•3)^(-1) = (2)^(-2) • (3)^(-1)

Final result :

     1             
  —————— = 0.08333 
  (22•3)