Answer:
[tex]1. \: (2 {a}^{2} b {)}^{0} = 1[/tex]
[tex]2. \: {y}^{2} \times {y}^{ - 4} = \frac{x}{ {y}^{2} } [/tex]
[tex]3. \: ( {a}^{5} {)}^{ - 1} = \frac{1}{ {a}^{5} } [/tex]
