$x^2-23x+120$
$65.87-8.696$
$\frac{sinxtanx}{sinx+tanx}=\:\frac{sinx}{1+cosx}$
$3^3-3x^2-9x+10$
$4+x>-6$
$\frac{dy}{dt}+20y\:=\:24$
$3.6x^3y^2+4.2x^4y^3-1.8x^5y^4$
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