(x-1)/3
    3x+3<2x+3
    90*m+50*(10-m)≤700
    x^3-x^2<1
    cos(x)^2-sin(x)^2+cos(x)+sin(x)>0
    x加3 2-x大于1
    2-x大于1 x+3
    4x+1.68x+1.16×4≥（x-16）×4+100.8
    2>-2x+3>-5
    5+1/x<0
    5+1/x<0
    lnlnlnlnlnlnx<10000
    1/x+sqrtx<0
    2/(4-4/3)<7/9
    2^x/((2^x-4/3)(2^x-2/3))>2^x/(2^x-1)^2
    500X+550（6-X）<=3100
    e^x+2x-1>0
    cosx+sinx+1>0
    (n+7)*2^(n-2)>2022
    -1200-800/(1+x)+600/(1+x)^2+370*[(1+x)^4-1]/[x*(1+x)^6]+550/(1+x)^7>0

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