According to exponent rules, when we raise a power to another exponent, we __________ the exponents.

Simplify the following:

When dividing powers with the same base, you __________ the exponents.

Simplify the following expression:

 $\frac{b^8}{b^4}$  

Simplify the following expression:

 $\frac{a^5b^2}{a^2b^4}$  

Simplify the following:

 $\frac{1}{x^{-7}}$  

Simplify the following expression with only positive exponents:

 $x^4y^0z^{-1}$  

Simplify the following expression with only positive exponents:

 $\frac{x^6y^{-3}}{x^{-4}y^2}$ 

Simplify the following expression:

Any number raised to the power of zero is always __________ .

Simplify the following expression:

Simplify the following expression as much as possible:

Simplify the following expression:

Simplify the following expression:

Simplify the following expression:

Simplify the following: