Answer
$$12x^2-12x+6-\frac{14}{x+1}$$
Work Step by Step
Simplifying the expression using long division, we obtain:
$$ 12x^2+\frac{-12x^2-6x-8}{x+1}\\ 12x^2-12x+\frac{6x-8}{x+1}\\ 12x^2-12x+6-\frac{14}{x+1}$$
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