(x*0.08+920 )*6>( x*0.05+580) *8
    (x-6)(x+3)>0
    3x^2+2x<0
    (x-3)/(x+2) ≤0
    (2x-3)/(x-1)＜1
    (x-3)/(x+2)≤0
    （m-10）÷（m×m)小于0
    x+1/2＜x/3+1
    6-2y小于等于7-3y
    300+0.5y>=318
    y<=50-0.25y
    4x>8x - 10
    x-3／2-x＞0
    (5x+1)/3-3<=x
    62.188+0.04*50/(0.024*x)+(0.024*x-50)^2/(2*x)<67.5
    3X^2-2X-16＞=0
    1-e(-(5000-k)*0.85^k*(1-0.85)-0.85^k)>0.99
    8/x＜4x
    x^2＜-8/x
    x^3＜-8

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