1. thil a sining a simi; e.g. H2o is the formula for water = H2o hi ti a sining a si;
2. thil tining, serning; e.g. A formula for making soap = Chatpiat ser tikah zeitin tuah ding, zeizei cawh ding timi kha a formula cu a si;
3. biaknak lei ah, zumhning fiang tein ca in ttialmi.