$$\frac{61}{5}-[\frac{-3}{4}]+[\begin{matrix}-41\\ 10\end{matrix}]$$
$\frac{57}{20}=2.85$
$$\frac{30+1}{5}-\left(-\frac{3}{4}\right)-\frac{4\times 10+1}{10}$$
$$\frac{31}{5}-\left(-\frac{3}{4}\right)-\frac{4\times 10+1}{10}$$
$$\frac{31}{5}+\frac{3}{4}-\frac{4\times 10+1}{10}$$
$$\frac{124}{20}+\frac{15}{20}-\frac{4\times 10+1}{10}$$
$$\frac{124+15}{20}-\frac{4\times 10+1}{10}$$
$$\frac{139}{20}-\frac{4\times 10+1}{10}$$
$$\frac{139}{20}-\frac{40+1}{10}$$
$$\frac{139}{20}-\frac{41}{10}$$
$$\frac{139}{20}-\frac{82}{20}$$
$$\frac{139-82}{20}$$
$$\frac{57}{20}$$
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$\frac{3 \cdot 19}{2 ^ {2} \cdot 5} = 2\frac{17}{20} = 2.85$
