$-3x+6<0$
$4x^2-8x-21$
$\frac{dx}{dz}=x$
$\left(3x\:+\:2y\right)\:\left(2y\:-\:3x\right)\left(5x^2\:-\:3xy\right)^2$
$\lim_{x\to2}\left(\frac{4x^2-5x-6}{x}\right)$
$x^2-10x+21=0$
$\left(0.3\cdot104\right)\left(7.105\right)$
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