$2\cos\left(\frac{x}{2}\right)-\sqrt{2}=0\:\:\left[-4\pi,\:5\pi\right]$
$\int x\left(x+5\right)^{-\frac{1}{2}}dx$
$\frac{-x+6x^3+11x^2-2}{3x-2}$
$\lim_{x\to5}\left(4x^2\right)$
$20n^{2}-9n-20$
$x^5\left(\frac{e}{x^4}\right)$
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