4X^3+2.66X^2-0.000000000146=0
    0.6q^2-12q+100=112-5.8q
    （8-4a）^2+(6-3a)^2=25
    0.7x=x-69
    0.6q^2-12q+100=112-2.9q
    -0.1X*X+60X-5000=0
    -0.1X2+60X-5000=0
    0.6q^2-9.1q-12=0
    (38+x)/(10+x)=3
    x—82=63
    6-a>0
    -3a<-7
    （4x^2）/3-（4√3+6）/3+3=0
    5x-2x^3-3=0
    2x^3-x-1=0
    146/190+3*x^2-2*x-1=-2.58/190^0.5*(-9*x^4+12*x^3-5*x^2+2*x)^0.5
    146/190+3*x^2-2*x-1=2.58/190^0.5*(-9*x^4+12*x^3-5*x^2+2*x)^0.5
    ln(0.4*x)/x=13436/9064000
    8^(2)－y^(2)＝15^(2)－(17－y)^(2)
    5x=7

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