$25x^2-81y^2$
$\int_{-2}^2\left(x^{-4}\right)dx$
$6x^2\:+\:7x\:-20\:=\:0$
$\frac{d}{dx}x^3+y^3-3xy+y^2=0$
$12m^2-5m-2=0$
$\frac{dx}{dt}=-x+e^{-2t}$
$s\left(t\right)=\frac{t^3}{3}-3.5t^2+10t+2$
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