Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (282) +  172

Step  2  :

 2.1     28 = 22•7

(28)² = (2²•7)² = 2⁴ • 7²

Equation at the end of step  2  :

  (24•72) +  172

Step  3  :

Final result :

  1073