360x-3840000=1.2(16000-x)^0.5
    5.46×(4.659+t)^2*（1.906+2/3*t）-18.57*t^2*(3.459.+2/3*t)=0
    x^3=1
    ex
    ex
    1.11+X/3.85+X=30%
    1+X/3+X=30%
    6.22*(3.5+t)^2*（1.13+2/3*t）-15.31*t^2*(2.1+2/3*t)=0
    x^4+x^3+x^2+x+1=0
    x^2+127x-619=0
    x2+127x-619=0
    arctanx＋arctan0.5x＝90
    1/e+lnx/e
    1/e+lnx/e
    1÷e＋lnx÷e
    6.22*(3.5+t)^2*（1.13+2/3*t）-14.98*t^2*(2.1+2/3*t)=0
    6.22*(4.8+t)^2*（2+2/3*t）-14.98*t^2*(3.6+2/3*t)=0
    5x(x-3)=6-2x
    5x(x-3)=6-2x
    5x(x-3)=6-2x

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