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  :

Equation at the end of step  1  :

Step  2  :

            52
 Simplify   ——
            -2

Final result :

  -25             
  ——— = -12.50000 
   2