Răspuns:
[1140-(5045:a-909)]:130=400:50
[1140-(5045:a-909)]:130=8
1140-(5045:a-909)=1040
-(5045:a-909)=1040-1140
5045:a-909=100
5045:a=100+909
5045:a=1009
a=5045:1009
a=5
(3000-a+1):[(463-313):75]-498=34
(3001-a):(150:75)=34+498
(3001-a):2=532
3001-a=1064
3001-1064=a
a=1937