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Pls help! 40 points given to answer!

1. simplify [tex]\frac{y^{-2} }{3y^{4} }[/tex]

2. divide[tex]20xy^{2} z^{12}[/tex] by [tex]4x^{2} yz^{24}[/tex]

3. simplify [tex]\frac{p^{8} q^{3} }{p^{2} q^{12} }[/tex]