27² + 3 x [ ( 3⁷ )⁹ : 3³⁰ + 3 x 3²⁷ - 3³³ ] : 9¹³ = 756
= 27² + 3 x ( 3 ⁷ˣ⁹ : 3³⁰ + 3⁽ ¹ ⁺ ²⁷ ⁾ - 3³³ ) : ( 3²)¹³ =
= 27² + 3 x ( 3 ⁽ ⁶³ ⁻ ³⁰ ⁾ + 3²⁸ - 3³³ ) : 3 ² ˣ ¹³ =
= 27² + 3 x ( 3³³ + 3²⁸ - 3³³ ) : 3²⁶ =
= 729 + 3 x 3²⁸ x ( 3⁵ + 1 - 3⁵ ) : 3²⁶ =
= 729 + 3 x 3² x 1 =
= 729 + 27 =
= 756
