（95*1685^2-320000*1685+132000000）/22
    36-36*85%+36*10%
    lg26
    2189.64×6.91%
    2166.54×6.91%
    2126.81×6.91%
    (2166.54+2275.56+2126.81)/3
    (2097.26+2275.56+2126.81)/3
    （2007.62+2097.26+2275.56）/3
    2.43/(1+5%/5)
    1*5/(1+5%)+2*5/(1+5%)^2+3*5/(1+5%)^3+4*5/(1+5%)^4+5*5/(1+5%)^5
    1*5/(1+5%)+2*10.25/(1+5%)^2+3*15.76/(1+5%)^3+4*21.55/(1+5%)^4+5*27.63/(1+5%)^5
    （1/125）*3/4-（-1/125）*1/4+（1/125）*4
    3sin1/3-6sin1/6
    cos1/6
    6sin1/6
    3sin1/3
    365*8+900*5+45*3+95*7+7*2+30
    (1+sqrt3)/2
    1+sqrt3/2

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