Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (402) +  412

Step  2  :

 2.1     40 = 23•5

(40)² = (2³•5)² = 2⁶ • 5²

Equation at the end of step  2  :

  (26•52) +  412

Step  3  :

Final result :

  3281