sqrt(x^2-8)＞2-x
    sqrt(a^2-8)＞2-a
    4x-5(2x+3)>5x-1(x-3)<3x-2(x-4)>2x-1
    4x-5(2x+3)>5x-1(x-3) 3x-2(x-4)>2x-1
    4x-5(2x+3)>3x-2(x-4)>2x-1
    4x-5(2x+3)>3x-2(x-4)
    4x-5(2x+3)>0
    3/x＞8
    i^2≤4
    ln(abs(x))≤2
    ln(abs(x))≤1
    log(3/7,(x+3^11))≤log(3/7,3)
    600-2x≤200
    300-x≤200
    33-6<12+x
    3345+66<999
    4x^3-9x+2>0
    2x-1/x+2>=3
    5/x>1
    x^2-x+2<0

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