$$6+(63 \div 7) \times 2+14-(78-65)$$
$25$
$$6+9\times 2+14-\left(78-65\right)$$
$$6+18+14-\left(78-65\right)$$
$$24+14-\left(78-65\right)$$
$$38-\left(78-65\right)$$
$$38-13$$
$$25$$
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$5^{2}$
