you just need to know the exponential rules
[tex]x^0=0[/tex]
[tex]x^{-a}=\frac{1}{x^a}[/tex]
[tex]x^1=x[/tex]
I'll just do some since you should get practice yourself and they're pretty similar
reember pemdas/order of operations, exponents before multiply
I like to factor them first so I don't get the order mixed up
5)
[tex]2m^0n^{-4}=[/tex]
[tex](2)(m^0)(n^{-4})=[/tex]
[tex](2)(1)(\frac{1}{n^4}=[/tex]
[tex]\frac{2}{n^4}[/tex]
7)
[tex]-x^2y^{-2}=[/tex]
[tex](-1)(x^2)(y^{-2})=[/tex]
[tex](-1)(x^2)(\frac{1}{y^2})=[/tex]
[tex]\frac{-x^2}{y^2}[/tex]
12)
[tex]-3k^{-1}=[/tex]
[tex](-3)(k^{-1})=[/tex]
[tex](-3)(\frac{1}{k^1}=[/tex]
[tex]\frac{-3}{k}[/tex]
