2s^2+13s+20=0
    3s^2+23s+20=0
    2s^3+3s^2+6s=0
    （x-8.0154）/x=0.4624
    50t+（30-t）80=1680
    50t+（30-t）=1680
    4t²÷(0.995-t)²÷(0.005-t)=exp(-228.57÷8.314÷0.298)
    4s^3+33s^2+20s=0
    （x-2.3066）/x=0.1632
    x ^3-16/10x-6/10=0
    s^3-6s^2-18s-20=0
    510+128n=10*(110-4n)
    x^3-1=0
    X+(X/11.3)=84500
    x＝-1/2
    X(0.1+2x)÷（0.1-x）＝9.1×1.1×0.00000000000000000001
    x∧2+5x+2250=0
    x2+5x+2250=0
    95.85/123.85＝x/396.162
    99.85/123.85＝x/396.162

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