$$5.321 \times 10-2+4.5 \times 10-4$$
$92.21$
$$53.21-2+4.5\times 10-4$$
$$51.21+4.5\times 10-4$$
$$51.21+45-4$$
$$96.21-4$$
$$92.21$$
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$\frac{9221}{2 ^ {2} \cdot 5 ^ {2}} = 92\frac{21}{100} = 92.21$
