$\frac{2x}{3}+5x^9-3x^4$
$tgx.\:ctgx.\:senx\:+\:cosx.\:secx\:-\:1$
$6x\ge24$
$\frac{x^5-x^4+x^2-2}{x^2+1}07$
$\lim_{x\to0}\left(\frac{4x-1}{x}\right)$
$a2\:-\:5a\:-\:6$
$\left(x^3y^5z^{-4}\right)\cdot\left(x^6y^{-7}z^{-2}\right)$
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