\frac { 9 ^ { n } \times 3 ^ { 2 } ( 3 ^ { - n / 2 } ) ^ { - 2 } - ( 2 – InterviewSolution

1.	\frac { 9 ^ { n } \times 3 ^ { 2 } ( 3 ^ { - n / 2 } ) ^ { - 2 } - ( 27 ) ^ { n } } { 3 ^ { 3 m } \times 2 ^ { 3 } } = \frac { 1 } { 27 }
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