$$(4^{2}+(16\div8+4^{2}))-5^{2}$$
$9$
$$16+\frac{16}{8}+4^{2}-5^{2}$$
$$16+2+4^{2}-5^{2}$$
$$18+4^{2}-5^{2}$$
$$18+16-5^{2}$$
$$34-5^{2}$$
$$34-25$$
$$9$$
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$3^{2}$
