\[\frac{x - 1}{2x - 6} - \frac{1}{x} - \frac{3x - 3}{2x^{2} - 6x} =\]
\[= \frac{x^{2} - x - 2x + 6 - 3x + 3}{2x(x - 3)} =\]
\[= \frac{x^{2} - 6x + 9}{2x(x - 3)} =\]