$\lim_{n\to0}ln\left(\frac{n}{n+1}\right)$
$3x^m+\frac{3}{x^m}$
$csc^2x+2\:cot\:x$
$\frac{\cos2x}{1+\sin2x}=-1$
$\sqrt[4]{\frac{x^5}{x^{\frac{1}{6}}}}$
$25a^{12}-100x^4b^{10}$
$8x+2+5$
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