4x-2(x-1)<4
    x^2+x>-2.75
    x^2+x>1
    x^2+x>-1
    x^2+x≥-1
    x^2+x<-1
    1-2x<0
    X÷(10+X)＞6÷10
    2/3*x+1>=(x-2)/5
    5x-1<2x+8
    2-x>4x-8
    4x-2-15x-3≤6 5x-1＜3x+3
    4x-2-15x-3≤6
    100a+150(100-a)>13200
    100a+15(100-a)>13200
    3x^2-26x+48＞0
    8-2(x+2)>0 ((5x+1)/2)+1>((2x-1)/3)
    4-x>0 5x-3<0
    360m+540(50-m)<21000
    x^2+5＜6

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