a^3+3×(1475.7-335)×a^2-72×560.6×(1475.7+335-60)(610-a)/670=0
    a^3+3×(1475.7-335)×a^2-24×560.6×(1475.7+335-60)(610-a)/670=0
    a^3+3422a^2-52734.2（610-a）=0
    a^3+3422a^2+52734.2a=52734.2×610
    （a-1711）×（a^2-2874786.8）=52734.2×610
    lnx=-3.056065922
    ln1.45
    ln(x/1-x)=-3.056065922
    2=10/x
    4.555×422.5×2×18-1005021830801.29×2×1568.1×18÷（599.6×18-1568.1）^3
    7.64×24^(-3)×(11010.3-1568.1)×0.9×411×14.1^(2/3)
    7.64×24^（-3）×1568.1×0.9×14.1^(2/3)
    (1/14)*(4+2*2.01148+3*1.862245)
    (1/2)*(5-2*2.01148+3*359/392)
    (1/4)*(10-2*53/28+2*359/392)
    8X-6X＝12十4十9
    arctan(0.1/99.99)
    arctan(0.001)
    1.000126^114514
    114514^1.000126

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