Posted by **A Girl.** on Thursday, February 2, 2012 at 10:03pm.

Simplify the expression. Write your answer using only positive exponents.

Explain as well.

1. (8x)^3*8^-4

2. 2x^-5*y^-3

3. (4x^4y^-3)^-2

4. 1/(3x)^-2

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