$\frac{2x^55}{x^2+1}$
$4x^2+9x+5$
$7\ge-4+n$
$\frac{d}{dy}\frac{x+y}{xy}=x$
$25-\left|-4-\left(-5-8+\left(-11-7+10\right)-9\right)+6\right|$
$\frac{dx}{dy}+x+\frac{2x}{y}=\frac{1}{y^2}$
$\lim_{x\to0}\left(\frac{\sin\left(5x\right)}{\sin x}\right)$
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