$\left(3m+2x\right)\left(3m+4x\right)$
$2z^2+8z-24=0$
$\frac{d}{dx}\left(s\left(t\right)=cos\left(3t^2+2\right)^2\right)$
$x^2-2x\ge15$
$5\cdot40$
$\frac{dy}{dx}+\frac{y}{9}=0$
$\frac{x}{x^2+x-20}$
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