$$25-C12-[10-[7-5-3]]$$
$14-C_{12}$
$$25-C_{12}-\left(10-\left(2-3\right)\right)$$
$$25-C_{12}-\left(10-\left(-1\right)\right)$$
$$25-C_{12}-\left(10+1\right)$$
$$25-C_{12}-11$$
$$14-C_{12}$$
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