Efectuati:
a)785+115+37x(15+23x12)
b)624-120+2025:(266-17x13)
c)145+47x[215x110-83x(405-18x16)]
d)512-287+10x{15+2x3+[105:15+(120-5x19)x10]x2}
e){123x35+10x[47+10x(407+2405:65)]-2785}x10
va rog mult de tot ajutatima