7125/((7000/X+5)/ [(1445.043+13350/X/95%)])≤4.5
    8+2.6（x-3）≤21.5
    -a^2+4a-4>0
    (4－3x)≥7
    abs(4－3x)≥7
    35000d^3-60d/3.1415926-61.115>0
    6（2/3x+1）≥2x-5
    7（x-1）＜4x＋3
    abs(x-abs(2x-1))>1
    abs(x)-abs(2x+3)
    (((10*t+77.81)/(7.8+t))*(2*(t-4.09)+0.8*10.89))/(11.89*10)≥1.6
    4x>15+6x
    x^2-1520x+147605≤0
    3(x-3)<7x-3
    2x-1>4x-4
    2(x-1)+3<3x
    x/2>(x+1)/3
    x/2-1<7-3x/2
    (x-2)/3+4>x
    x-2/3+4>x

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