$\frac{2nx^2}{x}$
$\lim_{x\to0}\left(\frac{5x^2+3x}{3x^2+2}\right)$
$\int\frac{5}{x\sqrt{16\cdot x^2-4}}dx$
$2=\frac{z}{2}$
$7+5+8-9+2-3$
$13w-11-2-10$
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