Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            2

Equation at the end of step  1  :

        1
  0 -  (—)3)
        2

Step  2  :

Equation at the end of step  2  :

        1
  0 -  ——
       23

Step  3  :

Final result :

  -1            
  —— = -0.12500 
  23