Use the properties of exponents to simplify the expression so that only positive exponents remain. 
Definitions:
Sticker
A type of adhesive label or decoration which can be attached to surfaces for informational or decorative purposes.
Nonpersonal Selling
A promotional method using advertising, sales promotions, and other mass-market approaches to sell products, as opposed to direct, face-to-face sales.
Direct Marketing
A strategy involving direct communication with individual consumers to obtain an immediate response and cultivate lasting customer relationships.
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