$4cosx+4cos\left(3x\right)$
$\arcsin\left(\sin\left(\frac{7\pi}{4}\right)\right)$
$\csc\:\left(\frac{3\pi\:}{2}-t\right)$
$\lim_{x\to0}\left(3x\right)^{\frac{x}{5}}$
$\sqrt{-9}+3\sqrt{-4}$
$\int\frac{2}{3}\left(1-x^2\right)^{\frac{3}{2}}dx$
$\left(3d^2\right)^0$
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