Найдите область определения функции y=(3*(x-4))/((x-4)(x+5))-(x+2)/(x*(x+5)).

\[y = \frac{3(x - 4)}{(x - 4)(x + 5)} - \frac{x + 2}{x(x + 5)}\]

\[x - 4 \neq 0\]

\[x \neq 4.\]

\[x + 5 \neq 0\]

\[x \neq - 5.\]

\[x \neq 0.\]

\[D(y) = ( - \infty; - 5) \cup ( - 5;0) \cup (0;4).\]