$$78-[24-\{16(5-4-1)\}]$$
$54$
$$78-\left(24-16\left(1-1\right)\right)$$
$$78-\left(24-16\times 0\right)$$
$$78-\left(24-0\right)$$
$$78-24$$
$$54$$
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$2\times 3^{3}$
