$$25-(8-5+3)-(12-5-8)$$
$20$
$$25-\left(3+3\right)-\left(12-5-8\right)$$
$$25-6-\left(12-5-8\right)$$
$$19-\left(12-5-8\right)$$
$$19-\left(7-8\right)$$
$$19-\left(-1\right)$$
$$19+1$$
$$20$$
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$2^{2}\times 5$
