Lingsrih
Clean Environment (Lingsrih) Mathematics is one of the work programs (proker) of the Student Association in the Field of Relations and Community Service or can be abbreviated as Hupmas. This program was previously called Passih Himatesa which was held for the first time in 2019. Passih itself stands for Pantaiku Clean with Himatesa. In 2021 it changed its name to Lingsrih Himatesa. The reason we changed the name of Passih to Lingsrih is because if Passih only focuses on the beach, it can clean up the environment everywhere.