$\lim_{x\to0}\left(\frac{7x+x^2}{x}\right)$
$2\left(x-5\right)\le10x+14$
$\left(n+\sqrt{n}\right)^2$
$\frac{x+3}{x}-\frac{x}{x-2}=-1$
$1^{-7}$
$4\left(3b+\left(-4\right)\right)-9$
$\sqrt[4]{\frac{1}{7}}x^2$
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