What are the best practices for using Flexible and Expanded widgets in complex responsive layouts?

When working with complex responsive layouts in Flutter, it is advisable to use the Flexible and Expanded widgets judiciously. The best practices include using Flexible to create flexible spaces within a Flex container, allowing widgets to share space proportionally. Additionally, the Expanded widget is applied to widgets that should take up the remaining available space. A combination of Flexible and Expanded can be used for optimal layout flexibility, ensuring that UI elements adjust dynamically to different screen sizes. It is crucial to avoid using Flexible and Expanded together in the same layout, as this can lead to unintended consequences and layout issues. Understanding these best practices is essential for building responsive and scalable Flutter user interfaces.