(x+2)÷(x-2√3)=√3
    x÷（1000-x）=1.78
    480=500cosx
    4（1.57+2xtan20）=4.33
    2/（1+y）＝1.994907
    132.74*（2-0.995f）＝2
    x^2-（0.3+1.75*10^（-5））*x+0.02=0
    x^2+15.4x+1=0
    0.995（1+2y）＝1
    132.74*（1+r-2*0.995r）＝1+r
    58*（1+r-2*0.95r）＝1+r
    lnx/ln5=138-3x
    (1.0011*cosX-0.00020)^2+(1.0011*sinX-0.035499)^2=1.0031^2
    (1.0011*cosX-0.09393333)^2+(1.0011*sinX-0.03311628)^2=1.0965^2
    (1.0011*cosX-0.0.09393333)^2+(1.0011*sinX-0.03311628)^2=1.0965^2
    (1.0011*cosX-0.104584157)^2+(1.0011*sinX+0.798782527)^2=0.5169^2
    (1.0011*cosX-0.156349391)^2+(1.0011*sinX+0.750983417)^2=0.4945^2
    (1.0011*cosX-0.15634)^2+(1.0011*sinX+0.75098)^2=0.4945^2
    (1.0011*cosX+0.15634)^2+(1.0011*sinX+0.75098)^2=0.4945^2
    (1.0011*X+0.15634)^2+(1.0011*sqrt(1-X^2)+0.75098)^2=0.4945^2

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