3x^2+8x-16大于0
    3x*2+8x-16大于0
    cotx/2>0
    2x^2-3x-2＜0
    5x^2-x-6＞0
    0.8^x<=0.1
    4(m^2)-4m+1>0
    m(4m-4)>-1
    -4k>-4
    -(a-1)^2-4>0
    a^2-2a+5<0
    789*(x+46.6%+55.1%+1)>=900*(1+x+46.6%+27.6%)
    789*(x+46.6%+55.1%)>=900*(x+46.6%+27.6%)
    0.466/（0.117X+1.361）≥0.534/6.12
    1-(0.7)^n>=0.9
    -(3x-6)<15
    3x-4≤6+x
    3x−4≤6+x3x-4≤6+x
    66*x^13-143*x^12+78*x^11>0.95
    66*x^13-143*x^12+78*x^11>0.8

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