Usage patterns
〈人〉に公平に接するto treat someone fairly
The teacher treats every student fairly.
公平を保つto maintain fairness
The referee must maintain fairness in the match.
公平を欠くto lack fairness; to be unfair
That ruling lacked fairness.
〈物〉を公平に分けるto divide something fairly
The siblings divided the inheritance fairly among themselves.
公平な立場a fair, impartial standpoint
He gave his opinion from an impartial standpoint.