$\frac{2^7}{2^2}$
$\lim_{n\to\infty}\left(\frac{ln\:n}{n}\right)$
$\frac{du}{dt}=e^{\left(3u+3t\right)}$
$sen2x\:-2senx\:-cosx\:\:\:+\:1\:=\:0$
$\tan\left(x\right)^3-2\tan\left(x\right)=\tan\left(x\right)$
$\frac{1}{x^{-9}}$
$\ln\left(x+4\right)+\ln\left(3\right)=\ln\left(x\right)$
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