$\frac{dx}{y}+\left(x^2-4x\right)dy=0$
$2\cos\left(\theta\right)+\sqrt{2}=0$
$\lim_{x\to\infty}\left(\sqrt{x+8}-\sqrt{x+7}\right)$
$801.35+0.13$
$\lim_{x\to0}\left(\frac{3\sin\left(4x\right)}{\tan\left(2\right)}\right)$
$\frac{2x^{3}-x^{2}+x}{x}$
$36x^2-12xy\:ty^2$
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