$\int8\cdot\cos^2\left(x\right)dx$

$\frac{-3^4}{-3^1}$

$\lim\:_{x\to\:0\:}\left(2\sin\:\left(\frac{1}{x}\right)\cdot\:\:x-\cos\:\left(\frac{1}{x}\right)\right)$

$\lim_{x\to0}\left(\frac{\sqrt{t\:}}{x^2}\right)$

$\frac{x}{4x^2+2x}$

$y^2\frac{dy}{dx}=\:e^{2x+y}$

$5^2+4-2\left(6+5\right)$