330/（1+10%）+440/（1+10%）2
    log(3,26)
    0^0
    !(32)
    !(31)
    !(35)
    !(30)
    !(25)
    !(20)
    !(50)
    !(5)
    !(170)
    !(173)
    !(5)
    1.63〖(28.82/(2000×10.65))〗^0.39×〖(35/0.7)〗^0.36
    -1/2-（-1/1）
    0.236/10000/8.314/295*1000*101.33/98*6.6
    0.236/10000/8.314/295/1000*101.33/98*6.6
    1/17/100*1000*997
    1/17/100*1000*997/987

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