$r^2\:+\:2r\:+\:1$
$\frac{-6}{x+5}\ge1$
$x^4+6x^3+11x^2+6x-24$
$y\:ln\left(x\right)ln\left(y\right)dx+dy=0$
$\lim_{x\to0}\left(\frac{x\left(2x+1\right)}{\cos\:-1}\right)$
$x^2\:+\:26x\:+\:25$
$\frac{x-3}{x+2}<2$
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