$4-5-6+2-2+14-23+16$
$24-5\cdot6$
$\frac{\csc\left(a\right)}{2\cos\left(a\right)}$
$\lim_{x\to2}\left(\frac{y^2+2y-8}{\sqrt{8-y^2}-y}\right)$
$\frac{9}{20}\:x\:\frac{25}{27}$
$49m^2-a^2$
$\lim_{x\to\infty}\left(x^5e^{-x^2}\right)$
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