Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x2"   was replaced by   "x^2". 

Step  1  :

Equation at the end of step  1  :

  (2 • (x2)) -  22x2
 Step  2  :

Equation at the end of step  2  :

  2x2 -  22x2

Step  3  :

Final result :

  -2x2