$\lim_{x\to0}\left(cosx-senx\right)^{cotgx}$
$\left(\frac{1}{\sqrt{1+4x}}\right)^4$
$\sqrt[3]{x^{n+4}}$
$\int3x\sec2x^2dx$
$\left(x+6\right)^2>x\left(x+10\right)$
$6+6+-50$
$\int\left(4x^2\sqrt{x^3-5}\right)dt$
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