$x^2-10x+211$
$\frac{x^7+2x^3-4x+5}{x-2}$
$\lim_{x\to\infty}\left(\frac{e^n}{n^2}\right)$
$4e+3d+5e-5d$
$2x+2+7x$
$onehalf\:\left(1\right)$
$10x^2+12x-15$
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