( 2^4/7 × 9^2/3)^21 /18^13

Находим значение следующего выражения.
( 2^4/7 × 9^2/3)^21 /18^13 = (2^4/7 × (3^2)^2/3)^21/(3^2×2)^13 = (2^4/7 × 3^4/3)^21/(3^26×2^13) = (2^4/7 × 3^(4-1))^21/(3^26×2^13) = (2^4/7 ×3^3)^21/(3^26×2^13) =( 2^84/7^21× 3^63)/(3^26×2^13) = 2^(84-13)×3^(63-26)/7^21 = 2^71 × 3^37/7^21.