$\lim_{n\to\infty}3+\frac{2n+6}{3n+1}$
$\left(a-2\right)\left(a+8\right)$
$\frac{8^2}{6^0}$
$\lim_{x\to-\infty}\left(\frac{\sqrt{4x^2-1}}{7-\left|x\right|}\right)$
$\int\frac{2t^3-t^2+3t-1}{t^4+3t^2+2}dt$
$1-2cos2a$
$\sin\left(2\theta\:\right)=\cos\left(\theta\:\right)$
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