69-57= 36-23= 99-98= 58-37= 96-23= 88-11＝ 39-24＝ 66-3＝
    57-4＝ 23-11= 52-2= 48-16= 54-21= 89-27= 78-26= 77-55=
    47-14= 36-21= 68-17= 77-23= 46-13= 49-15＝ 39-24＝ 66-33＝
    45-3＝ 78-35= 97-40= 43-22= 59-11= 98-25= 86-73= 47-6=
    45-14= 36-23= 88-55= 78-52= 46-23= 49-45＝ 37-24＝ 63-33＝
    45-34＝ 65-55= 97-52= 43-20= 59-25= 68-25= 96-73= 47-16=
    6.6ln1.004
    ln1.42
    30*0.8
    0.09*1000/10
    3.2/10*1000
    0.4*100/10
    2/1/0.05
    5/8
    8/5
    6/10
    6*0.1
    3.6/1.6
    5/3
    100/1000

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