Mathematics
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    1≤√a^2+(2a-3)^2≤3
    (x-800)/800>0.15
    x+5>2
    8 x1 + 5 x2 ≤ 80
    10 x1 + 20 x2 ≤ 200
    3x+4>1
    0<18-3x≤10
    abs(3k-2+3)>=sqrt(k^2+1)
    58+0.25(m-100)>88+0.20(m-150)
    b^2>1
    x^3-4x^2+6x-3≥0
    lnx+1/x>1
    50a+80(200-a)<=14000
    -2x<=2
    3x+1<2(x+2)
    3a-1+3/(a-1)-2ln((a-1)/3)>=0
    e((-a-2+sqrt(a^2+8))/2)*(1-a*((-a-2+sqrt(a^2+8))/2)-((-a-2+sqrt(a^2+8))/2)^2)<=1
    sinx=0.3 x<90
    sinx=0.3 0<x<90
    log(3,x)>-3/2x-3/2

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