-15000+x-x*8%/4<=4500
    0.75x+50≥380
    xlnx－（1/2)x^2＜-（1/2）
    x^4-x^3sinx＞0
    -4082750+3000000+W-450000-W*10%/4>=300000
    (1-4y)/y>4
    2/3x+5>1-x x-1<3/4x-1/8
    1/(2x-1)>=7-(3/2x)
    1/2x-1>=7-3/2x
    0.9<1/(((1-x^2)^2+(1.3*x)^2)^0.5)<1.1
    0.9<1/(((1-x^2)^2+(0.2*x)^2)^0.5)<1.1
    x＾2-2x≤0
    10-3x-6小于等于2x+2
    10-3(x-2)小于等于2(x+1)
    -2x^3+8x^2-16>0
    5x-1<3(x+1)
    1-m>0 m-3>0
    2x²-5x-3<0
    -x²-7x+8>0
    (2y-16)^2-12(32-y^2)≥0

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