Упростите выражение: (y^2-2y)^2-y^2(y+3)(y-3)+2y(2y^2+5).

\[\left( y^{2} - 2y \right)^{2} - y^{2}(y + 3)(y - 3) + 2y \cdot\]

\[\cdot \left( 2y^{2} + 5 \right) = y^{4} - 4y^{3} + 4y^{2} - y^{2} \cdot\]

\[\cdot \left( y^{2} - 9 \right) + 4y^{3} + 10y = y^{4} + 4y^{2} + 10y -\]

\[- \ y^{4} + 9y^{2} = 13y^{2} + 10y\]