\( \lim\limits_{n\to\infty} \) ( n - \( \frac{12n^3}{12n^2 + 6n + 1} \) )
= \( \lim\limits_{n\to\infty} \) ( \( \frac{n * ( 12n^2 + 6n + 1) - 12n^3}{12n^2 + 6n + 1} \) )
= \( \lim\limits_{n\to\infty} \) ( \( \frac{6n^2 + n}{12n^2 + 6n + 1} \) )
= \( \lim\limits_{n\to\infty} \) (\( \frac{n^2 * ( 6 + \frac{1}{n} ) }{n^2 * (12 + \frac{6}{n} + \frac{1}{n^2} ) } \) )
= \( \lim\limits_{n\to\infty} \) ( \( \frac{6 + \frac{1}{n}}{12 + \frac{6}{n} + \frac{1}{n^2}} \) )
= \( \frac{6 + 0}{12 + 6 * 0 + 0} \) = \( \frac{1}{2} \)