Simplify the expression.
$(-4t{)}^0,t\ne 0$

Simplify the expression.

$\frac{y^{27}}{y^9}$

Simplify the expression. Hint: rewrite using exponents first.

$\frac{64}{16}$

Use the quotient rule to rewrite each expression, then simplify.

$-\frac{12b^{11}}{4b^7}$

Use the quotient rule to rewrite each expression, then simplify.

$\frac{9x^2{y}^8}{3x{y}^2}$

Use the quotient rule to rewrite each expression, then simplify.

$\frac{30x^5{y}^3{z}^3}{-15x^2{y}^{3}z}$