Solution - Simplification or other simple results

Step  1  :

 1.1     14 = 2•7

(14)⁷ = (2•7)⁷ = 2⁷ • 7⁷

Equation at the end of step  1  :

  (97) • (27•77)

Step  2  :

 2.1     9 = 32

(9)⁷ = (3²)⁷ = 3¹⁴

Equation at the end of step  2  :

  314 • (27•77)

Step  3  :

Final result :

  (314•27•77)