$\lim_{x\to4}\left(\frac{x^2-16}{2\sqrt{x}}\right)$
$\lim_{x\to0}\left(\frac{\sqrt{3+x}-\sqrt{5}}{x^2-4}\right)$
$\int\cot\left(x\right)^4\cdot\sec\left(x\right)^2dx$
$\left(36x^4y^6\right)^{\frac{1}{2}}$
$64z^2-49$
$8,3-5,27$
$\frac{50x^3}{5x^5}$
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