x^2-2>=3x^2-2x+10
    （2x-3）（3x+1）<=0
    (x-1)²(x+3)<0
    ln ( 3 * x + 4 ) ≥0
    -194*x^8-15936*x^7-323548*x^6-778432*x^5-7871810*x^4+1172096*x^3+579424*x^2+8192*x+2048<0
    long2 *5 >long2 *3
    0.492/[(50+6.8x)/(90+15.3x)]>0.508/[(40+8.5x)/(90+15.3x)]
    4/x+x<=4
    x^2+10x-1500<0
    0.005x^2+0.05x-12<0
    1-x<>0
    x^2-16<0
    x^2-4x+3<=0
    x^2-4x+3<=0
    3^x+2>2
    (6-x)(150+50x)>=1000
    2/X≥-1
     2 （-（x^2-12）^0.5-3x）^3+3x（-（x^2-12）^0.5-3x）^2+（x^2+2）（-（x^2-12）^0.5-3x）+x+2<0
     2 （-（x^2-12）^0.5-3x）^3+3x（-（x^2-12）^0.5-3x）^2+（x^2+2）（-（x^2-12）^0.5-3x）+x+2> 0
     2 （（x^2-12）^0.5-3x）^3+3x（（x^2-12）^0.5-3x）^2+（x^2+2）（（x^2-12）^0.5-3x）+x+2< 0

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