$\sin^2\left(\frac{x}{2}-a\right)+\cos^2\left(\frac{x}{2}-a\right)$
$\left(xy+5\right)^5$
$y'+4y=\:32$
$-\frac{360}{-60}$
$\lim_{x\to0}\left(\frac{2e^x-2}{1-\cos\left(x\right)}\right)$
$\frac{48xy}{4xy}$
$\left(8-12\right)-\left(2-5\right)$
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