Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  ((22) +  (32)) +  23

Step  2  :

Equation at the end of step  2  :

  ((22) +  32) +  23

Step  3  :

Equation at the end of step  3  :

  (22 +  32) +  23

Step  4  :

Final result :

  21