12-9,12:3=12-3,04=8,96
(4,9:7+3,8)x2-7,8=(0,7+3,8)x2-7,8=4,5x2-7,8=9-7,8=1,2
16-3(18,9:12+1,2)=16-3(1,575+1,2)=16-3x2,775=16-8,325=7,675
(23,04-3,8x5,6):0,4+4,84=(23,4-21,28):0,4+4,84=2,12:4+4,84=0,53+4,84=5,37
(5,76:0,04-125,44):0,4-44,89=(144-125,44):0,4-44,89=18,56:0,4-44,89=1,51
