$-28+-34+4$

$x^2>=3x-2$

$\lim_{x\to0}\left(\frac{e^{2x}-e^{-2x}-4x}{x-cosx}\right)$

$\frac{1}{\csc\left(y\right)+\cot\left(y\right)}$

$\cot\left(a\right)\tan\left(a\right)+\sec^2\left(a\right)$

$\frac{dx}{dy}=y\left(1-y\right)$

$\int\left(\frac{\left(1-cos2x\right)}{2}\right)^2dx$