$sen\:2\:u\:=\:1\:+\:cos\:2\:u$

$\lim_{x\to infinity}\left(\frac{\sqrt[3]{x}}{\ln\left(x\right)}\right)$

$\frac{dn}{dt}=0.5\cdot n\cdot\ln\left(\frac{1}{n}\right)$

$\frac{7}{2}x-9$

$\left(-2a+3b^2\right)\left(5a^2b^2-4a+b\right)$

$\frac{dy}{dx}\left(cosylnx=coxlny\right)$

$m^2+9m-34=0$