\[\boxed{\mathbf{932\ (932).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[a < b < 2\]
\[a^{2}b + 2b^{2} + 4a < ab^{2} +\]
\[+ 2a^{2} + 4b\]
\[a^{2}b + 2b^{2} + 4a - ab^{2} -\]
\[- 2a^{2} - 4b < 0\]
\[\text{ab}(a - b) + 2 \cdot \left( b^{2} - a^{2} \right) +\]
\[+ 4 \cdot (a - b) < 0\]
\[\text{ab}(a - b) + 2 \cdot (b - a)(b + a) +\]
\[+ 4 \cdot (a - b) < 0\]
\[(a - b)(ab - 2b - 2a + 4) < 0\]
\[(a - b) \cdot\]
\[\cdot \left( b(a - 2) - 2 \cdot (a - 2) \right) < 0\]
\[(a - b)(a - 2)(b - 2) <\]
\[< 0 \Longrightarrow верно.\]