Mathematics
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    89.84×1.1×0.8893
    1-1/(1+4.5%)^50
    66.10+0+5+3.46+7.11+8.17
    (66.10+0+5+3.46+7.11)×10%
    (66.10+0+5)×10%
    (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)

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