I have a complicated scenario with ADFS.
It's possible I have a Web Application with Forms Based Authentication and ADFS Proxy?
If true, please give the examples or articles.
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Implement Web Application Proxy. You can optionally implement ADFS 3.0 using a non-claims aware relaying party trust in order to not need to convert SharePoint to using SAML authentication.
This is a great guide on how to do this. Part 2 - Securely publishing SharePoint externally using Web Application Proxy (WAP). Using this method will provide a pre-authentication experience for your users (FBA).