Final answer to the problem
$\cos\left(\sin\left(2x=\tan\left(2y\right)\right)-2x\right)$
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Step-by-step Solution
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Because cosine is an even function
$\cos\left(\sin\left(2x=\tan\left(2y\right)\right)-2x\right)$
Final answer to the problem
$\cos\left(\sin\left(2x=\tan\left(2y\right)\right)-2x\right)$