Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            2

Equation at the end of step  1  :

         8   7
  0 -  (—— • —)
        14   2

Step  2  :

            4
 Simplify   —
            7

Equation at the end of step  2  :

        4   7
  0 -  (— • —)
        7   2

Step  3  :

Final result :

  -2