z^3-z^2-(0.01425758515003^2+0.01425758515003-0.1284310914027)*z-0.01425758515003*0.1284310914027=0
    z^3-z^2-(0.01107332697813^2+0.01107332697813-0.08613543462107)*z-0.01107332697813*0.08613543462107=0
    z^3-z^2-(0.00796433196134^2+0.00796433196134-0.04649500258179)*z-0.00796433196134*0.04649500258179=0
    z^3-z^2-(0.005267557307718^2+0.005267557307718-0.0151378100326)*z-0.005267557307718*0.0151378100326=0
    200x*x+290x=32
    0.003x^2-0.02x=38
    10*lg(x)=14.48
    10*lg(x)=-14.48
    1-10x=1/（1+x)^12
    1-10x=1/（1+x)^13
    x≤800 y>800 ax+by=40960 a+b=31
    1022/（X/12）=15
    15=1022/（X/12）
    x^(2)－1200x+6084≥0
    2%=x*33.33%+(1-x)*(-25%)
    x*0.11-0.1*x-1495=0
    x*0.1-0.1*x-1495=0
    0.0002*X*X+0.001*X-0.00003
    (1+x)*-1
    x+3+2x＝7x+1

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