You will need a tool like 7-Zip or WinRAR to extract the contents.
If you are looking at a programming assignment, a .rar file may contain Java resources (Resource Adapter Archive) or Maven-plugin generated code used to package resource adapters. How to open and view the content: tarea4.rar
Some systems (like older versions of ChromeOS) may struggle with multi-part or password-protected .rar files. You will need a tool like 7-Zip or
Multi-part RAR Archives (PW protected) are not supported. Anyone? Multi-part RAR Archives (PW protected) are not supported
To find a specific file inside many archives, tools like Everything can help index the contents if they are already on your drive.
Research papers on FESPM describe "Tarea 4" in a pedagogical context, focusing on the analysis of mathematical tasks and the "process and object" perspectives of specific concepts.