Mathematics
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    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
    (3/4)-(1/(x-3))>(x/(x+4))
     lg(2x-1) ≤1
    0 <= x <= 5
    x+25.72x^(5÷12)>=357.38
    x+23.48x^(5÷12)>=357.38
    65×20+4x≤2000
    2*(1/3)^(2n-1)/(2n-1)<0.0001

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