$\lim_{t\to\infty}2\sqrt{t}e^{\sqrt{t}}$
$-\left(4x-2\right)^7$
$x^3+y^3=18$
$\frac{x^3+x^2+3x+a}{x-1}$
$8.9+x-x^2$
$x^2-10x+20$
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