$5+2\cdot9$
$\frac{2^{4}-5z^{2}+2}{3}$
$17+13+32-2x$
$\tan\left(x\right)=\sec\left(x\right)\cdot\tan\left(\frac{x}{2}\right)+\tan\left(\frac{x}{2}\right)$
$cot^2xsec^2x+csc^2x$
$\left(32\right):8$
$\lim_{x\to\infty}\frac{2x^3+2x-2}{4x^2-3x+1}$
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