$5x^2+6x-11$
$x^4+3x^3-10x^2$
$\frac{dy}{dx}=\left(x+1\right)t$
$5a\:-\:55$
$s^2-6s+11$
$\lim_{x\to\infty}\left(\frac{4x^3+2}{x^2+20x}\right)$
$\left(4y-3z\right)\left(3y-4z\right)$
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