$\cos x-\sin x\tan x$

$\cos\left(2\right)x-3\sin\left(2\right)x$

$\lim_{x\to\pi}\left(\frac{x+\pi secx}{x^2-\pi^2}\right)$

$\log\left(x\right)+5\log\left(y\right)-5\log\left(z\right)$

$\int_0^3\left(\frac{t^2}{\left(1-t^2\right)^{\frac{3}{2}}}\right)dt$

$4^{x-2}=16^{x-4}$

$\sqrt{2y^2}$