4- kwi -1} impompo yamanzi abilayo

4- kwi -1 {i-{3} . xa kuthelekiswa neefayile zemveli, i {{7}

Okokuqala, {{0} ye 4- kwi-{-1 -1 -1

Okwesibini, umsebenzi oqinileyo we 4- kwi--1 -1 {i-{2}} amanzi angathandekiyo, eli nqaku livumela ukuba banandiphe amanzi acocekileyo, esempilweni nakweyiphi na ixesha ., i-{4} . kumgangatho wokubila unokuxhonywa kwiinkqubo zokupheka ezifana ne-fumes, iqhosha elishushu elishushu {{7}

Ukukhulula, {{0} {{1} -1 {{2} {i-2 {2} {{4} . Ndiyakholelwa ukuba kwixa elizayo, {{5}