7x-173/24>2.3
    (1-(200-x)^(-3))>=0.333
    sqrt(x)>(1+x^(3/8))*lnx
    sqrt(x)>lnx(1+x^(3/8))
    x^(1/8)>sqrt(lnx)
    (2k+1)^2-4(k^2+1)>0
    2πx^2-3π^2*x^2+100πx≤0
    4a^2-4a≤0
    4a^2+12a≤0
    3x^2-3＜0
    0.4x-11大于2.4x-21
    lnx>1÷x＋1
    -408.275+x+300-（10%x/4+45）≥30
    500x-0.5x-10-500*7.96＞0
    500x-5-0.5x-5-500*7.96＞0
    500x-5-0.5x-5-500*7.96＞0
    500x-5-0.5x-5-500*7.96＞0
    ex-1/ex-2x+1>1
    1800A+150(70-A)≥30000
    -3/2b＞0

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