Explicație pas cu pas:
a = (5 + 7:7 +2 - 2:2) x 2
a=(5+1+2-1)X2
a=7x2
a=14
b = [36 - 16: (35: 7 - 12 : 3)]: 5 - 4
b=[36-16:(5-4)]:5-4
b=(36-16:1):5-4
b=(36-16):5-4
b=20:5-4
b=4-4
b=0
c = 7+3 x [2 - 27 : (5 x 5 + 2 : 1)]
c=7+3x[2-27:(25+2)]
c=7+3x(2-27:27)
c=7+3x(2-1)
c=7+3x1
c=7+3
c=10
2 xa-2x b + 2 x c=
2x14-2x0+2x10=
28-0+20=48
