$x^4-2x^3-5x^2+2$
$3\sqrt{5}+5\sqrt{5}$
$\left(x+a\right)\left(x^2+ax+a\right)$
$\left(mn^3+p^2\right)x=16$
$\lim_{x\to1}\left(\frac{1}{x-1}-\frac{1}{x^2-1}\right)$
$-5x-8x-9x$
$\left(4x+xy^2\right)dx\:+\left(y+x^2y\right)dy=0$
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