$\lim_{x\to0}\left(\frac{6}{x}\right)$
$\int\frac{2x-3}{x^2+2x+17}dx$
$\frac{\tan\left(x\right)-\sin\left(x\right)}{\sin\left(x\right)}$
$\left(-1+\frac{1}{n}\right)^2$
$\int\frac{\left(e^{2x}-e^{-2x}\right)^2}{e^x}dx$
$4n^2-20+25$
$\frac{\left(3x^2-2x\right)}{\left(3x+2\right)}<-2$
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