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Simplify the expression completely:
` ((9 x^9)/(3 x^3))^(- 4)` =
` ((9 x^9)/(3 x^3))^(- 4)` =
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Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question