sqrt(3x-4)-sqrt(x-3)>0
    -4+x>5
    4-x>5
    (x-1)(x+2)^2>=0
    x^4+8x^2-9<0
    -3x^2+2x+1<=0
    -3^x+2x+1<=0
    x^2-4x+3>0
    0.5<=(3a^2+2a+sqrt(9a^4+6a^3+7a^2+4a+1)+1)/(3a^2)<=2
    0.5<=(3a^2+2a-sqrt(9a^4+6a^3+7a^2+4a+1)+1)/(3a^2)<=2
    (3a^2+2a-sqrt(9a^4+6a^3+7a^2+4a+1)+1)/(3a^2)
    (3a^2+2a+sqrt(9a^4+6a^3+7a^2+4a+1)+1)/(3a^2)
    （2y+3/2）y=-1
    5x+200>4.5x+225
    5x+20>4.5x+225
    5x+200>4.5x+255
    (11+x)(59-x)>12*58
    0.6x>x-250
    0.55x>x-250
    0.6x>x-200

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