Lavisisa eka mimbuyelo

[[File:algebraic equation notation.svg|thumb|right|Nongonoko wa xivutiso xa Nhlayo-vuringanisi]] ...all of mathematics." p. 1, Ginn and Company, 1964</ref>  Tidyondo leti ta Nhlayo-vuringanisi i tankoka ngopfu eka Tidyondzo ta lehenhla ta Tinhlayo, Sayensi ...