$\left(\:x+4\:\right)\:\left(\:3x\:-9\:\right)$
$3x^2+14x-18$
$\lim_{x\to-2}\left(x^3-2x^2+18\right)$
$36x^4+120x^2y^2-100y^4$
$\left(\frac{\sqrt{3}}{10}+\frac{i}{10}\right)^2$
$x-3\le5$
$6r+\frac{3}{4}s\:,\:r=-2,s=4$
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