[2430-6*(723-319)]*2+488=
1428:[(1500-1496)*5+2*11]-34=
[7*216-(512+548)+2*324]:11=

1)723-319=404 6*404=2424 2430-2424=6 6×2=12 12+488=5002)1500-1496=4 4×5=20 2×11=22 20+22=42 1428÷42=34 34-34=03)512+548=1060 7×216=1512 2×324=648 1512-1060=452 452+648=1100 1100÷11=100