Which of these is the correct simplification of (2x3y2)3(2x^3y^2)^3(2x3y2)3?
6x9y66x^9y^66x9y6
8x9y68x^9y^68x9y6
8x6y58x^6y^58x6y5
2x9y62x^9y^62x9y6