Выполните действия: ((x+4)/(3x+3)-1/(x+1)):(1+x)/3-2/(1-x^2).

\[= \frac{1^{\backslash 1 - x}}{x + 1} - \frac{2}{(1 - x)(1 + x)} =\]

\[= \frac{1 - x - 2}{(x + 1)(1 - x)} =\]

\[= \frac{- 1 - x}{(1 - x)(x + 1)} =\]

\[= - \frac{1}{1 - x} = \frac{1}{x - 1}\]