Formal:
* Pagpapahayag ng sarili - This is the most literal and formal translation.
* Ekspresyon ng sarili - This is a more direct translation using the English word "expression."
Informal:
* Pagpapahayag ng damdamin - This emphasizes expressing emotions or feelings.
* Paglalabas ng saloobin - This means expressing one's thoughts or opinions.
* Pagbibigay-kahulugan sa sarili - This focuses on expressing one's unique identity or perspective.
The best translation will depend on the specific context and what aspect of self-expression you want to emphasize.