1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1+2.3+3.4+6.5)*(2.3+3.4)2.8.8-0.8*8.8-0.83.(2.8-2.8*0.6)/(0.6+0.52)4.(6.2*1.25+1.25*2.6)/2.25.(1.25*2.7*5.1)/(8.1*0.25*1.7)6.(0.8*0.6/1.2)/0.257[0.35/(3.74-3.24)/0.4]*0.2883.7-3*0
1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1+2.3+3.4+6.5)*(2.3+3.4)
2.8.8-0.8*8.8-0.8
3.(2.8-2.8*0.6)/(0.6+0.52)
4.(6.2*1.25+1.25*2.6)/2.2
5.(1.25*2.7*5.1)/(8.1*0.25*1.7)
6.(0.8*0.6/1.2)/0.25
7[0.35/(3.74-3.24)/0.4]*0.28
83.7-3*0.7-3.7*0.6