$$1\frac{1}{3}+3\frac{3}{4}$$
$\frac{61}{12}\approx 5.083333333$
$$\frac{3+1}{3}+\frac{3\times 4+3}{4}$$
$$\frac{4}{3}+\frac{3\times 4+3}{4}$$
$$\frac{4}{3}+\frac{12+3}{4}$$
$$\frac{4}{3}+\frac{15}{4}$$
$$\frac{16}{12}+\frac{45}{12}$$
$$\frac{16+45}{12}$$
$$\frac{61}{12}$$
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$\frac{61}{2 ^ {2} \cdot 3} = 5\frac{1}{12} = 5.083333333333333$