$\cos x+\sec x$
$5\cos\left(6x\right)+6=9$
$-29-\left(-34\right)$
$3\left(a+8\right)$
$x^4+18x-19$
$\lim_{x\to2}\left(\frac{y^2+2y-8}{\sqrt{8-y^2}-y}\right)$
$2\left(log\left(x+2\right)+\frac{3}{2}log\left(x+1\right)\right)$
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