y=-24（y/（2.468-1.468y））+11.25
    x^2-387/1129-1000/1129
    1/3absx+2<4
    -24/（2.468y-10468）+11.25/y=1
    2absx-1>3
    10*（1+0.0915）^（10-x）+30*（1*0.0915）^（10-2x）=67.5
    absX>-3
    0.4s^3+2.6s^2+3.2s+6=0
    0.4s^3+2.6s^2+3.2s-4=0
    （0.9/x）^2=3/6
    t^2*e^12t
    0.4s^3+2.6s^2+3.2s+1=0
    0.4=1/x-[1/(3.6*x)^2]
    18.5+113.5X=17+142.3X
    -x^3-8x^2-47x+46
    0.4*s^3+2.6*s^2+3.2*s=0
    y∧2+10y-150=0
    0.4*s^3+2.6*s^2+3.2*s+1=1.09
    x1-x2+x3=3 x1+2x3=6 x2+x3=3 3x1-x2-4x3=13
    X^2+2x+5>0

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