$$6\frac{1}{3}-1\frac{4}{5}+3\frac{8}{15}$$
$\frac{121}{15}\approx 8.066666667$
$$\frac{18+1}{3}-\frac{1\times 5+4}{5}+\frac{3\times 15+8}{15}$$
$$\frac{19}{3}-\frac{1\times 5+4}{5}+\frac{3\times 15+8}{15}$$
$$\frac{19}{3}-\frac{5+4}{5}+\frac{3\times 15+8}{15}$$
$$\frac{19}{3}-\frac{9}{5}+\frac{3\times 15+8}{15}$$
$$\frac{95}{15}-\frac{27}{15}+\frac{3\times 15+8}{15}$$
$$\frac{95-27}{15}+\frac{3\times 15+8}{15}$$
$$\frac{68}{15}+\frac{3\times 15+8}{15}$$
$$\frac{68}{15}+\frac{45+8}{15}$$
$$\frac{68}{15}+\frac{53}{15}$$
$$\frac{68+53}{15}$$
$$\frac{121}{15}$$
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$\frac{11 ^ {2}}{3 \cdot 5} = 8\frac{1}{15} = 8.066666666666666$
