$$A=4/3+5/3-2/5$$
$A = \frac{13}{5} = 2\frac{3}{5} = 2.6$
$$A=\frac{4+5}{3}-\frac{2}{5}$$
$$A=\frac{9}{3}-\frac{2}{5}$$
$$A=3-\frac{2}{5}$$
$$A=\frac{15}{5}-\frac{2}{5}$$
$$A=\frac{15-2}{5}$$
$$A=\frac{13}{5}$$
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$A≔\frac{13}{5}$