$$2+5 \times \frac{ 1 }{ 2 }$$
$\frac{9}{2}=4.5$
$$2+\frac{5}{2}$$
$$\frac{4}{2}+\frac{5}{2}$$
$$\frac{4+5}{2}$$
$$\frac{9}{2}$$
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$\frac{3 ^ {2}}{2} = 4\frac{1}{2} = 4.5$
