Evaluate the following limit: `underset( x rarr 3) ( "lim")(1/(x-3)-3/(x^2-3x))`

Explanation

To evaluate the limit

\[ L = \lim_{x \to 3} \left( \frac{1}{x - 3} - \frac{3}{x^2 - 3x} \right), \]

we will follow these steps:

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