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  :

            3
 Simplify   —
            7

Equation at the end of step  1  :

  3
 (—)-2
  7

Step  2  :

Final result :

  1 • 72
  ——————
  1 • 32