(83-79)×18〕280+840÷24×5325÷13×(266-250)85×(95-1440÷24)58870÷(105+20×2)1437×27+27×56381432÷(13×52+78)[37.85-(7.85+6.4)] ×30156×[(17.7-7.2)÷3](947-599)+76×6436×(913-276÷23)-(3.4 1.25×2.4)0.8×〔15.5-(3.21 5.79)〕(3...