$$2 \frac{ 1 }{ 32 } +3 \frac{ 3 }{ 16 } -1 \frac{ 1 }{ 8 }$$
$\frac{131}{32}=4.09375$
$$\frac{64+1}{32}+\frac{3\times 16+3}{16}-\frac{1\times 8+1}{8}$$
$$\frac{65}{32}+\frac{3\times 16+3}{16}-\frac{1\times 8+1}{8}$$
$$\frac{65}{32}+\frac{48+3}{16}-\frac{1\times 8+1}{8}$$
$$\frac{65}{32}+\frac{51}{16}-\frac{1\times 8+1}{8}$$
$$\frac{65}{32}+\frac{102}{32}-\frac{1\times 8+1}{8}$$
$$\frac{65+102}{32}-\frac{1\times 8+1}{8}$$
$$\frac{167}{32}-\frac{1\times 8+1}{8}$$
$$\frac{167}{32}-\frac{8+1}{8}$$
$$\frac{167}{32}-\frac{9}{8}$$
$$\frac{167}{32}-\frac{36}{32}$$
$$\frac{167-36}{32}$$
$$\frac{131}{32}$$
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$\frac{131}{2 ^ {5}} = 4\frac{3}{32} = 4.09375$
