$$500- \{ (6-1)8 \div 4 \times 3+16 \div (10-2) \} -5$$
$463$
$$500-\left(\frac{5\times 8}{4}\times 3+\frac{16}{10-2}\right)-5$$
$$500-\left(\frac{40}{4}\times 3+\frac{16}{10-2}\right)-5$$
$$500-\left(10\times 3+\frac{16}{10-2}\right)-5$$
$$500-\left(30+\frac{16}{10-2}\right)-5$$
$$500-\left(30+\frac{16}{8}\right)-5$$
$$500-\left(30+2\right)-5$$
$$500-32-5$$
$$468-5$$
$$463$$
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