7.0875-4又三分之二*0.72+六十四分之五十七除以2.85=7.0875-14/3*0.72+57/64*100/285=7.0875-14*0.24+20/64=7.0875-3.36+0.3125=7.4-3.36=4.04十五分之二除以（1.1-3.4）+五分之一*五分之三=-2/15*10/23+3/25=-4/69+...