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

$\frac{d^2}{dx^2}\left(\frac{\left(x+1\right)}{y}\right)$

$-1-2-1$

$\int_0^{4\cos\left(y\right)}\left(\sqrt{16-x^2}x\right)dx$

$\int sen\left(5x\right)\:dx$

$l\lim_{x\to+\infty}\left(\frac{2x}{\left(\sqrt{x}\:-1\right)\left(2-\sqrt{x}\right)}\right)$

$\lim_{x\to-2}\left(\frac{4-\sqrt{2x}}{2x^3-16}\right)$