Solution - Simplification or other simple results

Step  1  :

 1.1     34 = 2•17

(34)² = (2•17)² = 2² • 17²

Equation at the end of step  1  :

  (212) +  (22•172)

Step  2  :

 2.1     21 = 3•7

(21)² = (3•7)² = 3² • 7²

Equation at the end of step  2  :

  (32•72) +  (22•172)

Step  3  :

Final result :

  1597