3600*40a%-12.8a%*2560≤644
    3.45m≤10
    x÷60+x*0.0045=1764
    x/60+x*0.45%=1764
    x/60+x*0.45%
    4
    1/-2a<1
    -1/2a>1
    (x-10) (x+20) > 0
    4225a^(2)-39000a+90000 > 4478625
    285(x-276)<300(x-285)
    10000cosx<4624(1-sinx)
    (x+4)/3>2x-1
    3x-1≥2(x-1)
    (x-1)/(x-2)>1/2
    2592xx+34810x-522150<0
    abs x-15>=56+abs2x-3
    abs x-7>=56
    x-7>=37
    2(2x-1)-(5x-1)≥1

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