$\lim_{x\to1}\left(\frac{sin\left(\pi x\right)}{lnx}\right)$
$\int\frac{1}{x^3-4x}dx$
$\int\frac{x^4+2x+1}{x^3-x^2-2x}dx$
$9+9.\sqrt{ab}$
$\left(8a-2b^2\right)^3$
$\left(x+y+x^2\right)^3$
$4z^2+4z-4$
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