-2x^2+x+3>0
    4x^2-1>0
    2（3x-1)-4(5x-8)
    2（3x-1)-4（5x-8）小于x-4(x-2）
    x²-70x+600＞0
    x²-70x+600＞0
    4x^2-1>0
    1/((1-x)^2+1.44*x)^(1/2)<1.1
    1/((1-x)^2+1.44*x)^(1/2)>0.9
    1/((1-x)^2+1.44*x)^(1/2)<1.1
    2x²<2x+1
    e^x-x<2
    e^x-x<1
    C(22,x)*0.2∧x*0.8∧(22-x) ≥0.5
    C(22,x)*0.8∧x*0.2∧(22-x)≧0.5
    C(x,22)*0.8∧x*C(22,22-x)*0.2∧(22-x)≧0.5
    x+7<4
    8x²－8x+4＞0
    3m<23
    0.25*(1+m-√(m*m+2m+9))>2

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