se dau multimile: A={1,2,3,5}: B={0,1,2,4,6}: C={2,4,6,8}: D={1,3,5,7,9}: E={0,1,2,3,4,8} Sa se afle:AUB: BUC: CUE: BUCUD: BnC: AnE:DnE: A\B, B\C,D\E, E\C, B\A, (AUB)nc; (BUC)n(AUE) DnE,(AnB)n ( ønC); (AUB BUC)n (CUDUE)​