$2x^2-3x-5$
$\frac{8x^2-4x-7}{x^2}$
$4m^2+44m+121$
$x^2\:+\:2x\:=\:168$
$450+450+450$
$\int\frac{2x^2}{\sqrt{1-x^6}}dx$
$4x+24x^3$
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