$$7\frac{1}{4}-1\frac{3}{5}+3\frac{1}{3}$$
$\frac{539}{60}\approx 8.983333333$
$$\frac{28+1}{4}-\frac{1\times 5+3}{5}+\frac{3\times 3+1}{3}$$
$$\frac{29}{4}-\frac{1\times 5+3}{5}+\frac{3\times 3+1}{3}$$
$$\frac{29}{4}-\frac{5+3}{5}+\frac{3\times 3+1}{3}$$
$$\frac{29}{4}-\frac{8}{5}+\frac{3\times 3+1}{3}$$
$$\frac{145}{20}-\frac{32}{20}+\frac{3\times 3+1}{3}$$
$$\frac{145-32}{20}+\frac{3\times 3+1}{3}$$
$$\frac{113}{20}+\frac{3\times 3+1}{3}$$
$$\frac{113}{20}+\frac{9+1}{3}$$
$$\frac{113}{20}+\frac{10}{3}$$
$$\frac{339}{60}+\frac{200}{60}$$
$$\frac{339+200}{60}$$
$$\frac{539}{60}$$
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$\frac{7 ^ {2} \cdot 11}{2 ^ {2} \cdot 3 \cdot 5} = 8\frac{59}{60} = 8.983333333333333$
