$\frac{secx+1}{secx}=\frac{sen\:^2x\:}{1-cosx}$

$\frac{\left(\left(\sqrt[3]{27}\right)^{-6n}\cdot3^2\cdot3^3\right)}{\left(\left(9^{-n}\right)\cdot9\right)^3}$

$\frac{x^3+x^25x+7}{x+3}$

$m^2+7m-18$

$\int\frac{x+1}{x^2+2x+8}dx$

$\frac{d}{dx}\left(\sqrt{x+\sqrt{1-2x}}\right)$

$\int\sin\left(2mx\right)dx$