\[\frac{14}{3 - x} - \frac{x}{x^{2} - 9} = \frac{2x^{2}}{x^{2} + 16}\]
\[ОДЗ:\ \]
\[3 - x \neq 0\]
\[x \neq 3.\]
\[x^{2} - 9 \neq 0\]
\[x^{2} \neq 9\]
\[x \neq \pm 3.\]
\[x^{2} + 16 \neq 0\]
\[x^{2} \neq - 16\]
\[нет\ таких\ \text{x.}\]
\[Ответ:кроме\ x = \pm 3.\]