GRE
$$(a+a^{-1})^{2}$$
$$a^{2}$$+$$a^{-2}$$
The units digit of 3n
The units digit of $$n^{3}$$
The number of the subsets of $$S_8$$
The number of the subsets of $$S_9$$ that contain the integer $$9$$
($$\frac{2}{3}$$@$$\frac{2}{3}$$)@$$\frac{2}{3}$$
$$\frac{2}{3}$$@($$\frac{2}{3}$$@$$\frac{2}{3}$$)
The length of a diagonal of square T
The length of a side of square S
$$P$$
$$Q$$
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