Solution - Power equations

Step  1  :

 1.1     729 = 36

(729)² = (3⁶)² = 3¹²

Equation at the end of step  1  :

Step  2  :

            312
 Simplify   ———
             3 

Dividing exponents :

 2.1    3¹²   divided by   3¹   = 3^{(12 - 1)} = 3¹¹

Final result :

  311