GRE
$$3^{2y}$$
$$3^{-2y}$$
$$|\frac{c}{d}|$$
$$(\frac{c}{d})^2$$
The probability that neither E nor F will occur
0.5
$$\frac{8^28^{-4}}{8^3}$$
$$\frac{1}{2^{15}}$$
$$z$$
$$2y$$
$$r+s$$
$$0$$
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