$-3x+5<2x-15$
$\lim_{x\to0}x^2\cot\left(x\right)$
$\frac{d}{dx}x^2+y^2=n^2$
$\frac{1}{y}y^'=\frac{1}{\sqrt{x^2+1}}$
$66,54+9,393$
$y'\:+\:2y\:=\:y^2\:+\:1$
$\sin^2x+\cos\left(2x\right)=\cos^2x$
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