$x^2+x+6=0$
$\frac{dn}{dt}=0.25n\left(10-n\right)$
$\sqrt{9+3\:sin^2\left(x\right)}$
$1-3x^2<-8$
$x^2-12x-133=0$
$\lim_{x\to0}\left(\frac{1-\cos5x}{3x}\right)$
$+2-1+14-3$
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