$\lim_{x\to0}\left(\frac{\sin\left(x\right)}{\ln\left(x+1\right)\cos\left(3x\right)}\right)$
$x^2-2x^2-2$
$y''\:+\:3y'\:+\:2y\:=\:0$
$9t^2-4=0$
$\left(x\:+\:mx\right)+\left(a\:+\:ma\right)$
$y-2\le\:0$
$3\cos\left(a\right)^2=1+5\sin\left(a\right)$
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