Mathematics
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    35-28x<40-20x
    12*9=36*3 67<58
    12*9=36*3 67>58
    34*56=5<6
    34*56=>
    78>56>45
    4<78>56>45
    4<78>56
    4<78
    2<8
    2^x≥1000000000000
    x+2小于x+6
    4x-3大于等于2x-5
    15x-10≤20x+25-20
    ((x+5)/2)-((x+7)/6)>1
    10x-8 ≤15x+20-20
    200a+170(30-a)≤5500
    x(x-1)(x+1)<0
    2x>=5x-6
    0.5x+0.5>-1

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