Упростите выражение (x^2-9)/(10-3x)*(2/(x-4)-4x/(x^2-x-12)-1/(x+3)).

\[D = 1 + 48 = 49\]

\[x_{1,2} = \frac{1 \pm 7}{2}\]

\[x_{1} = 4;\ \ x_{2} = - 3.\]