ajutoooooooororrrrrr please coronita 15 pcte ex 3

25+81-32=106-32=74
3x49-16=149-16=133
3x64+2x81=194+162=356
(27-6):21=21:21=1
(144-121):1=23:1=23
5x(169+64)=5x233=1165