$10x+5\le10+2x$
$\lim_{x\to-1}\left(\frac{\left(x^2+4x+3\right)}{x^2+x}\right)$
$w^2+9w+18=0$
$\sin\left(x\right)\cos^2ydx-\cos\left(x\right)\sin ydy$
$\sin^2x\:.\:cos^2x\:.\:\tan^2x\:=\:sen^4x$
$\sqrt[4]{xy^3}$
$\sin^2b=1-cos^2b$
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