x＾3+5x＾2＋3x＜0
    x＾2＜0
    3*x-2<5*x+1
    3*x-2<2*x+1
    abs(5x-3)<2-5x
    x*cosx-sinx>0
    -2x²+3＜2
    x-32>x*x+5x-2
    40[50-10(x-50)]＜3000
    x*1.04>(1-x)*1.09
    -1=<(2x-1)/7<=1
    x（30-2x）＞100
    x≤-2 x>-1
    x^2-3*abs(x)+2>0
    x²－2x－3≤0
    x²－5x＋9＞0
    abs(x-1)+abs(x-2)>5
    9-x²≥0
    （x+2）（x-3）>0
    30^(1-x)+3*60^(1-x)>4*50^(1-x)

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