$$2i^{4}+6i^{3}$$
$2-6i$
$$2\times 1+6i^{3}$$
$$2+6i^{3}$$
$$2+6\left(-i\right)$$
$$2-6i$$
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$2$
$$Re(2\times 1+6i^{3})$$
$$Re(2+6i^{3})$$
$$Re(2+6\left(-i\right))$$
$$Re(2-6i)$$
$$2$$
