（77.10+0）×1×4.35%+5×1×1/2×4.35%
    -（3000 + 35^2)
    308*1.1/0.7*0.43
    （650*0.56+180*150/10000）*70%+380*0.56+80*150/10000
    （650*0.56+180*150）*70%+380*0.56+80*150
    4/3+9/8+16/15+25/24+36/35+49/48+64/63+81/80+100/99+121/120+144/143+169/168+196/195+225/224+256/255+289/288+324/323
    arccos(17/18)
    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

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