arccos17/18
    17/18-cos1/3
    sin1/3
    abs-3
    e-1
    arctan(1/3)
    2ln2-5/3
    ｛(50%-21%)^2*0.3+（30%-21%）^2*0.2+（10%-21%）^2*0.3+（-15%-21%）^2*0.2｝^（1/2）
    ｛(60%-30%)^2*0.3+（40%-30%）^2*0.2+（20%-30%）^2*0.3+（-10%-30%）^2*0.2｝^（1/2）
    1/118
    2023/(2023+2023/2024
    2023/(2023+2023/2024)
    0.5+1/4+0.125+1/8-1
    52.5*（1+9.1%）^10
    52.5*（1+9%）^10
    sin(arctan(sqrt(2))
    sin(arctansqrt(2))
    -20*ln10+10-0.1
    -4*ln4+4-0.25
    1+2=

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