Solution - Simplification or other simple results

Step  1  :

            3
 Simplify   —
            8

Equation at the end of step  1  :

        3   3
  0 -  (— • —)
        7   8

Step  2  :

            3
 Simplify   —
            7

Equation at the end of step  2  :

        3   3
  0 -  (— • —)
        7   8

Step  3  :

Final result :

  -9            
  —— = -0.16071 
  56