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Simplify. Use the definition of a negative exponent to write all exponents as positive.

`(5 m^9 n^12)(4 m^-8 n^1)`
 

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   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
log logn ln n  | | e 
sin cos tan arcsin arccos arctan  
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