GRE
$$\frac{5^{15}}{5^{5}}$$
$$\frac{5^{18}}{5^{6}}$$
$$0.5^{3}$$
$$(5^{3})((\frac{1}{2})^{3})((\frac{1}{5})^{3})$$
$$(\frac{1}{3})^{x}$$
$$(-\frac{1}{2})^{x}$$
$$-\sqrt{9}$$
$$\sqrt[3]{-27}$$
$$(\frac{2}{y})^{3}$$
($$\frac{3}{y})^{2}$$
$$\sqrt{\frac{1}{4^{2}}}$$
$$\frac{1}{4}$$
$$(x^{3}+1)^{2}$$
$$x^{6}$$
$$(2^{2})(420)$$
$$2^{5}(105)$$
z
y
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