$\lim_{x\to\infty}\left(\frac{\sqrt{4+\frac{1}{x}}-2}{\frac{1}{x}}\right)$
$x^2-20x=0$
$2\ln\left(x\right)+3\ln\left(y\right)-\ln\left(4\right)$
$\frac{5}{13}-\frac{3}{5}=\tan\left(x\right)$
$\int\frac{t^5}{t^2+5}dt$
$\frac{x^2-9x+16}{x-3}$
$1-2sin^210x$
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