方程組

(math.) simultaneous equations / system of equations

surname Fang

square / power or involution (math.) / upright / honest / fair and square / direction / side / party (to a contract, dispute etc) / place / method / prescription (medicine) / just when / only or just / classifier for square things / abbr. for square or cubic meter

mathematical equation

rule / order / regulations / formula / journey / procedure / sequence

surname Zu

to form / to organize / group / team / classifier for sets, series, groups of people, batteries

(math.) system of polynomial equations