Mathematics
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    1-2x<11
    1+3x>4x-2
    2x+8<=5x+10
    3(x-1)≥x+2
    -5≤-3x+4≤10
    (a^2+9)/(3*a^2-6*a+9)<=a/3+4/3
    1<2^x <4
    -x+3>-2
    5/3x-3<=-4/3[-5/4(6/5x-3)+9]+x
    5/3x-3<=-4/3[5/4(6/5x-3)+9]+x
    1/2x+1/3x≥10
    -[2(x+2)/7]-(x+3)/4>1
    -[2(x+1)/7]-(x+3)/4>1
    -3x>15
    (x-1)/3-(2-2x)/5>=x/15
    3/4x>=-1/2x-5
    60x+48*(60-x)≤3000
    3000x+(100-x)*800<=168000
    1.7x>=100-x
    x/sqrt(1-x^2)>0.732

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