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
 Simplify   ——
            7 

Equation at the end of step  1  :

  1   -1
  — • ——
  2   7 

Step  2  :

            1
 Simplify   —
            2

Equation at the end of step  2  :

  1   -1
  — • ——
  2   7 

Step  3  :

Final result :

  -1            
  —— = -0.07143 
  14