$x\:-\:2\:<=\:2x\:-5$
$6yz+2yz-8yz$
$2z^2+8z-24=0$
$\lim_{z\to0}\left(ln\left(z\right)\right)$
$x^4-8x^2-240$
$14x\left(-3\right)$
$\frac{sinxcos-sinx}{cos^2x}=\frac{1-cosx}{sinx}$
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