$-y^2$

$-y^{-2}$

$-y^{12}$

$-y^{35}$

$x^{21}$

$x^4$

$x^{-21}$

$x^{-10}$

-1

0

1

UNKNOWN

$5^{45}$

$5^{15}$

$5^3$

$5^{54}$

-b

0

1

-1

UNKNOWN

-1

0

1

UNKNOWN

-1

0

1

UNKNOWN

-1

0

1

UNKNOWN

-1

0

1

UNKNOWN

$\frac{1}{5^{-4}}$

$\frac{1}{5^4}$

$5^4$

$\frac{5^{-4}}{-1}$

$\frac{1}{x^5}$

$-x^5$

$\frac{1}{-x^{-5}}$

$\frac{1}{-x^5}$

$y^{-7}$

$\frac{1}{y^7}$

$y^7$

$\frac{1}{y^{-7}}$

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

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

$\frac{8^{-3}}{9^{-2}}$

$\frac{9^{-3}}{8^{-2}}$

$\frac{b^6}{c^5}$

$\frac{c^6}{b^5}$

$\frac{-b^5}{-c^6}$

$\frac{c^5}{b^6}$