x^4+8x2-9<0
    x-5*sqrt(x)+6>0
    -4x^2-2x+1>0
    -3x^2+4x-2^(-x)*ln(2)>0
    （X*0.3%）/（X*5.36%+1270）>3.5%
    12x+10(8-x)<=89 200x+(8-x)*160>=1380
    2加x大于1
    1-(2x-3)/5<=(3x-1)/4
    20-4(2x-3)<=5(3x-1)
    0.1x*360>=1.2*240
    1/2(2-x)>1/2*x-1
    60x+28(30-x)<=1480
    sqrt(t+sqrt(t^3))<=t
    2*a+a^2>a*(a^2+a)
    a^2>a
    287989*1.137^x>12500000*1.03^(x-1)
    80x+50(54-x)<=4000
    80x+50(54-x)0<=4000
    x/(3-x)>0
    2小于等于x 3大于等于x

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