$\frac{d^2}{dx^2}\left(x^2+y^2+2xy\right)$

$5x+1<14$

$\frac{dy}{dx}\left(x^{6tan\left(x\right)}\right)$

$y=\frac{3x^3+4x^2+4x}{4x^2-5}$

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

$\lim_{x\to\infty}\left(x\:\ln\left(\frac{x}{x+2}\right)\right)$

$\pi^2\int_{-\pi}^{\pi}sin\left(nx\right)dx$