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  :

            1
 Simplify   —
            2

Equation at the end of step  1  :

  1
  — • -2
  2

Step  2  :

Final result :

  -1