452+[10200-(81:9×3+45)+246-41=452+[10200-(9×3+45)+246-41=452+[10200-72+246-41]=452+10333=10785
[84+6000:(14+6)-14]:[(40-10)+(75-68)]=[84+6000:20-14]:[30+7]=[84+300-14]:37=370:37=10
47502:[17+69-(17+41)]+220×(639+891)=47502:[86-58]+220×1530=47502:28+336600=1696,5+336600=338296,5