$\frac{x^2+6x+9}{2x+1}$
$\int23e^xdx$
$x^2-6x+9^2$
$4x^2-12x>-9$
$\int\frac{\left(3x+8\right)}{x^3-4x^2+4x}dx$
$9+x=28$
$-12i+\sqrt{-25i}$
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