Can you please help with this problem: my previous post didn't come out correctly:

(4X5Y6Z)2 x (5X9Y12Z)3

The number after the letter is an exponent....4X to the fifth power

Thank you

(4x^5 y^6 z)^2 (5x^9 y^12 z)^3

????????????????
if so

16x^10*125x^27 * y^12 y^36 * z^5

= 2000 x^37 * y^48 * z^5

note
a^b * a^c = a^(b+c)
(a^b)^c = a^bc