$$\frac{1}{2}+\frac{1}{2}+\frac{2}{4}+\frac{6}{2}$$
$\frac{9}{2}=4.5$
$$\frac{1+1}{2}+\frac{2}{4}+\frac{6}{2}$$
$$\frac{2}{2}+\frac{2}{4}+\frac{6}{2}$$
$$1+\frac{2}{4}+\frac{6}{2}$$
$$1+\frac{1}{2}+\frac{6}{2}$$
$$\frac{2}{2}+\frac{1}{2}+\frac{6}{2}$$
$$\frac{2+1}{2}+\frac{6}{2}$$
$$\frac{3}{2}+\frac{6}{2}$$
$$\frac{3+6}{2}$$
$$\frac{9}{2}$$
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$\frac{3 ^ {2}}{2} = 4\frac{1}{2} = 4.5$
