1234567890x
    !(x)
    absx+x^-1
    32*x*0.01+25＞32*346.61*0.01
    31*x*0.01+25＞31*346.61*0.01
    30*x*0.01+25＞30*346.61*0.01
    a<(1/a)
    a>(1/a)
    (1/x-1)^x-(1-x)^(1/x) >1
    -3/11 *x^2+128x-1000>0
    -3/11×x^2+128x-1000>0
    -10*x*x+700*x-10000>=2000
    -10*x+700*x-10000>=2000
    （-1-x)(1-x)<0
    1/x<0
    16k-32>0
    p^2-5p-36>0
    k^2-4k+4>0
    (4k/(k+1))^2>2.4
    (4k/k+1)^2>2.4

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