\[\boxed{\text{492\ (492).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[2x^{4} + 3x^{2}y^{2} + y^{4} + y^{2} =\]
\[Так\ как\ x^{2} + y^{2} = 1:\ \]
\[x^{2} \cdot 1 + x^{2} \cdot 1 + y^{2} \cdot 1 + y^{2} =\]
\[= x^{2} + x^{2} + y^{2} + y^{2} =\]
\[= x^{2} + y^{2} + x^{2} + y^{2} =\]
\[= 1 + 1 = 2.\ \]