$\int\frac{x}{x^3+3x^2-9x-27}dx$
$2\left(x^2-8x\right)$
$dx-\left(y-2xy\right)dy=0$
$\frac{1}{6}y+\frac{1}{6}\left(y+12\right)-2$
$cos^4x=1$
$4^{-1}\left(7+5\right)^0$
$\lim_{x\to\infty}\left(-\frac{2}{3}\right)^n$
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