解:原式=106/9-91/10-41/5+22/3+17/3-106/5=(106+66+51)/9-(91+82+212)/10=223/9-385/10=223/9-77/2=(446-693)/18=247/18
106/9-91/10-41/5+22/3-233/15 ,238500/20250-184275/20250-166050/20250+148500/20250-314550/20250 ,-277875/20250 , -247/18