$10x^2y+2xy,\:x=-5,\:y=-2$
$12m^2-40m+25$
$\frac{2}{x}+4>0$
$-2u^2+u$
$12r\:+\:5\:+\:3r\:-\:5$
$\frac{x^3-x^2-14x-24}{x+3}$
$-x^2+30x+35$
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