$\left(x\:-\:\frac{1}{3}\right)^2$
$x^2+12x+10$
$\frac{dx}{dy}=2+2x+y+xy$
$-2-9+13-16-15$
$14.3-18.2$
$3+3\cdot2+3\cdot9$
$\lim_{x\to-4}\left(\frac{x^3-9x}{x^2-\:3x}\right)$
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