$$3/2-1/2=31/30$$
$\text{false}$
$$\frac{3-1}{2}=\frac{31}{30}$$
$$\frac{2}{2}=\frac{31}{30}$$
$$1=\frac{31}{30}$$
$$\frac{30}{30}=\frac{31}{30}$$
$$\text{false}$$
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