$$2 \times 2 [ 5 + 0.5 ( 2 - 2 ) - 0.5 \{ 216 \div ( - 4 ) \} ]$$
$128$
$$4\left(5+0.5\left(2-2\right)-0.5\times \frac{216}{-4}\right)$$
$$4\left(5+0.5\times 0-0.5\times \frac{216}{-4}\right)$$
$$4\left(5+0-0.5\times \frac{216}{-4}\right)$$
$$4\left(5-0.5\times \frac{216}{-4}\right)$$
$$4\left(5-0.5\left(-54\right)\right)$$
$$4\left(5-\left(-27\right)\right)$$
$$4\left(5+27\right)$$
$$4\times 32$$
$$128$$
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$2^{7}$
