4911.002+1229.453y-2.5*80000*0.000916y^2 (3*4.57-y)/6-2.5*25000*0.000916y^3 (2*4.57-y)/12
    s
    1229.453-837.224y-39.216y^2+19.083y^3
    x(x-1)=10.5
    20/0.6
    1229.453-837.224y-39.216y^2+18.083y^3
    xx-x-7/4=0
    2.4＝x^0.6
    x2+x=36
    x^(2)+3x+4=0
    x-sin(x)=0.2464
    1229.453-(2.5*80000*0.000916y(2*4.57-y))/2-(2.5*25000*0.000916y^2 (3*4.57-2y))/6
    x2+3x+4=0
    5/(1+x)+5/(1+x)^2+105/(1+x)^3=110
    x＝(3.1748)^0.4
    4（x-1）^(2)-9（x-5）^(2)＝0
    4(11+x)=3(17+x)
    x^0.6=2
    x∧2＋3x＋1＝0
    27x^4+27x^2-1/（x^4）-1/(x^2)=0

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