0.09*x^2 - 10^(-14)*x + 9*10^(-14)+0.0452*x^3 +0.0299*x^2 - 1.3211*x - 69.278=0
    2x^2-3x+1=0
    0.09*x^2 - 10^(-14)*x + 9*10^(-14)+0.0194*x^3 + 0.1089*x^2 - 0.2365*x -49.971=0
    0.35*x*x+x+0.35=0
    0.09*x^2 - 10^(-14)*x + 9*10^(-14)+0.0395x^3 -0.2932x^2 - 0.226*x - 19.98=0
    0.09*x^2 - 10^(-14)*x + 9*10^(-14) +0.0395x^3 -0.2932x^2 - 0.226*x - 19.98=0
    1.1*4023850 ≤22.4*10^6*0.5*x*(2.1-x/2)
    s(s^2+0.4s+1)
    (3x^2-6x+3)(x^3-3x^2)
    s^2+0.4s+1
    x*x=1
    2025000+16*x*x*x*x+36900*x*x=0
    -244.785*x^4+744.36*x^3-742.47*x^2+271.66*x+19.045=0
    1.1*9260100≤22.4*10^6*2.2*x*(2.08-x/2)
    172.1599-0.014286x=165.3899+(x-11.4)/4
    172.1599+0.014286x=164.9699+(x-11.4)/4
    x^(2)+x+4
    arctan(35.4/2)-arctan(35.4x5)
    12000/(1+i)-1680/(1+i)^2=8040
    arctan(35.4/2)

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