9x62-6x+1<=0
    x*x-2x+1>0
    -x*x+2x>3
    9x*x-6x+1<=0
    4（2x-1）>3（x＋2）
    19.6078*（x-153）/x = 2
    9x^2+6x-8>0
    10x^2+11x-6>0
    6x^2+25x+14<0
    16x^2+8x-3<0
    10x^2-33x+20<0
    -2^2+6x-5<0
    2x^2+11x+12>0
    3x^2-37x+12>0
    3x2-37x+12>0
    3x2-37+12>0
    x2-x-12<0
    x2+5x+6>0
    100-a>35
    45a+3400-34a<3800

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