$\lim_{x\to2}\left(\frac{x^2-2x}{x-2}\right)$
$x^2-9x-27=13-3b$
$\frac{v^2-64}{v-8}$
$6xy\left(x-5y+2xy\right)$
$y+16=15$
$-1+2+2$
$\left(10x^3-4x+11\right)+\left(9x^3+3x^2-2x+4\right)$
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