40800*(3500: 70): 100-328*60 1321+(1600-600*2550: 1000)*8097

40800*(3500:70):100-328*60=40800х50:100-19680=2040000:100-19680=
=20400-19680=720

1321+(1600-600*2550:1000)*8097=1321+(1600-1530000:1000)х8097=
=1321+(1600-1530)х8097=1321+70х8097=1321+566790=568111