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If $$X + \frac{1}{X} = 2K$$, then what is the value of $$X^{4} + \frac{1}{X^{4}}$$?
$$16K^{4} - 16K^{2} - 1$$
$$8K^{4} + 4K^{2} - 1$$
$$16K^{4} - 16K^{2} + 2$$
$$16K^{4} - 4K^{2} - 1$$
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