Question

[25:5+(19-9:3)-72:9]-[13-(21:7+11)].
VA ROG REPEDEE!!!
AJUTATI-MA!!!
REPEDE!!

Answer 1

[25:5+(19-9:3)-72:9]-13-(21:7+11)]=
=[25:5+(19-3)-72:9]-[13-(21:7+11)]
=[25:5+(16-72:9]-[13-(21:7+11)]
=[25:5+(16-8]-[13-(21:7+11)]
=[25:5+8-[13-(21:7+11)]
=[25:5+8-[13-(3+11)]
=[25:5+8-[13-14)]
=[25:5+8-1)]
=[5+8-1)]
=13-1
=12

Am schimbat 13-14 nu se poate.
14-13=1