\[\textbf{а)}\ D(x) = \lbrack - 2;\ 4\rbrack;\ \ \]
\[E(y) = \lbrack - 3;\ 3\rbrack.\]
\[\textbf{б)}\ D(x) = \lbrack - 2;\ 5\rbrack;\ \ \]
\[E(y) = \lbrack - 3;\ 0\rbrack \cup \lbrack 2;\ 6\rbrack.\]
\[\textbf{в)}\ D(x) = \lbrack - 3;\ - 1) \cup ( - 1;\ 3);\]
\[E(y) = (0;\ 4\rbrack.\]
\[\textbf{г)}\ D(x) = \lbrack - 6;\ 3\rbrack;\]
\[E(y) = ( - 3;\ 1\rbrack.\]