8 - 7+1=?, 6 - 8-2=?, 2 - 8=6+?, 3 - 8-5=?, 7 - 1=8-?, 4 - ?+4=8, 6 - 2=8-?, 7 - 4+3=?, 6 - 7=?+1, + - 8=5?3, - - 7=8?1, + - 6?2=8, 7 - 6=?-1, 8 - 2=?-6, 7 - 1=?-6, = - 7?6+1, < - 4+2?8, < - 5+2?8, = - 7+1?5+3, > - 6+2?3+4,

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