1*555
    0.25*exp(-0.25*11)
    exp(-2.75)
    （644.184-434.541）×0.9789/0.97
    434.541+((609.593-434.541))/0.835
    (434.541-292.956)/0.97
    （639.280-434.541）×0.9789/0.99
    434.541+((609.593-434.541))/0.855
    6.524×10^(-12)×〖938.183〗^4+-6.036×10^(-8)×〖938.183〗^3-2.3482926×〖10〗^(-4)×〖938.183〗^2+0.8258×938.183+41.686
    -10/37
    (7.280673ln430.725+2×-1.434148×10^(-3)×430.725+3/2×2.3482926×10^(-7)×〖430.725〗^2+4/3×-1.0484129×10^(-9)×〖430.725〗^3+5/4×1.242904×〖430.725〗^4×10^(-13)
    282.28÷300×100×70％+318÷750×100×30％=
    282.28÷300×100×70％+350÷750×100×30％=
    2-3
    10^309
    0^-1
    0÷0
     38.71*(1+3.7%)
    (7.280673ln430.725+2×-1.434148×10^(-3)×430.725+3/2×2.3482926×10^(-7)×〖430.725〗（^2）+4/3×-1.0484129×10^(-9)×〖430.725〗(^3)+5/4×1.242904×〖430.725〗(^4)
    (421.01-294.87)/0.99

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