$\arcsin\left(\frac{x}{4}\right)+\frac{\sqrt{16-x^2}}{x}$
$\cot\left(\sec^2x-1\right)$
$\left(3x^3+4\right)\left(2-6x\right)$
$3\left(2.001\right)^4-5$
$\sqrt{64a^3}$
$\lim_{x\to0}\left(\frac{\sqrt{x^2+5}-3}{x-2}\right)$
$2\cdot\left(3g-18h\right)$
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