$$5+(- \frac{ 3 }{ 4 } )+(-3)$$
$\frac{5}{4}=1.25$
$$\frac{20}{4}-\frac{3}{4}-3$$
$$\frac{20-3}{4}-3$$
$$\frac{17}{4}-3$$
$$\frac{17}{4}-\frac{12}{4}$$
$$\frac{17-12}{4}$$
$$\frac{5}{4}$$
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$\frac{5}{2 ^ {2}} = 1\frac{1}{4} = 1.25$
