Răspuns:
a=(73 x 9-318-777:3)+796-63 x 10
a=(657-318-259)+796-630
a=(339-259)+796-630
a=80+796-630
a=876-630
a=246
6-5: [4-3: (2-2: b)] =1
5:[4-3:(2-2:b)]=6-1
5:[4-3:(2-2:b)]=5
[4-3:(2-2:b)]=5:5
4-3:(2-2:b)=1
3:(2-2:b)=4-1
3:(2-2:b)=3
(2-2:b)=3:3
2-2:b=1
2:b=2
2:b=1
b=2:1
b=2
(246×2)-(246+2)=492-248=244