$\int\left(3-5e^{-2x}\right)^{\frac{1}{3}}e^{-2x}dx$
$6x^4-3\cdot2x^3+2\cdot4x^2+6\cdot4x$
$\sec^2\left(x\right)+2\tan\left(x\right)=0$
$-\tan\left(-x\right)\cot\left(-x\right)$
$\frac{2}{x-2}+1$
$\lim_{x\to0}\left(\frac{x\cos x-\sin x}{x^2}\right)$
$y-1y+2$
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