$\lim_{x\to0}\left(\frac{\sqrt{5+x}-\sqrt{6}}{x}\right)$

$\lim_{x\to0}\left(\frac{e^{-x}-e^{-2x}}{sen^2x}\right)$

$\int_0^x\left(x\left(x-y\right)\right)dy$

$g\left(x\right)=3sen\left(9x+1\right)e^{-4x^6-5}$

$2x^{-3}$

$\left(9x^{-6}+5y^{8n}\right)\left(9x^{-6}-5y^{8n}\right)$

$4.4+5.6$