\[\boxed{\mathbf{1551}\mathbf{.}}\]
\[1)\ y = \frac{3x^{2} - 2x + 1}{x + 1};\]
\[= \frac{3x^{2} + 6x - 3}{(x + 1)^{2}} = \frac{3\left( x^{2} + 2x - 1 \right)}{(x + 1)^{2}}.\]
\[2)\ y = \frac{2x^{2} - 3x + 1}{2x + 1};\]
\[= \frac{4x^{2} + 4x - 5}{(2x + 1)^{2}}.\]