$\frac{x^3-6}{3x^2}$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{\tan\left(4x\right)}{4x-\pi}\right)$
$2sin^2x-5cosx+5=0$
$\left(5w-z\right)^2$
$0.6x-1=5+1.3x-0.6x$
$\left(1+x^{\frac{3}{4}}\right)^2$
$-2x^2+18-36$
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