(1/x)/2-2<=x
    6((2/3)x-2)
    x+3/2:2x-1/3＞1
    -v^6+9*10^16*v^4-4*(3*10^8)^6/0.0090025<=0
    2/3x-1≥2x+1
    5÷x+2-4÷x-1≤0
    5/x+2-4/x-1≤0
    2x－6＞3x
    3/2x-1-2/5x+1＜1
    x+2/3≤3(x-2)/4+1/2
    x+2/3≤3(x-2)+1/2
    -2
    (7x-6)/(2x+3)>=0
    x^2+1>0
    abs（3X＋7）＞1
    (3x-1)/(x-5)<=0
    X＾2－6x－7＞0
    4k^2-8k+8>0
    6x-3≤8x+4
    2/x-1≥0

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