Use Case - Difference between Include and Extend Notation

I see people always struggling with include/exclude notation inside use case diagrams. I think these diagrams could explain it better. use case diagram include…

Use Case Diagram Enterprise Architect User Guide

user interface - use case diagrams include and extend - Stack Overflow

Use-Case Diagrams

Use-Case Model - Javatpoint

What are Include and Extend Relationships in a Use Case Diagram?

Informal Semantics for UML Use Case Diagrams

Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).

The Rationale for OO Associations in Use Case Modelling

uml - Use case generalization versus extension - Stack Overflow

UML use case include relationship shows that behavior of the included use case is inserted into the behavior of the including use case.

Solved Show the relationship between the problem statement

Use Case Relationships

Use Case Diagram Relationships Explained with Examples - Creately Blog

Use Case Diagram Tutorial (Guide with Examples)