C(100,x)*(0.98^x)*(0.02^(100-x)) > 0.95
    0<=25x-4.9×625/400×(1+x^2)<=3.44
    0<=25x-4.9/400×625×(1+x^2)<=3.44
    tan(x)-x/180=0.5/637100000 x<90
    3x+2（x-1）>13
    4x+6＜5
    x（x－1）≥40
    (x-1)(x-2)^2abs(x-3)/(x-4)≥0
    1-3∧x＞0
    abs（1-x^2)<1
    n<8lgn
    100(n^2)>2^n
    3x≤2/4x-1
    3/3x+8≥2/5x-1
    2（5-x）＜7-x
    2x^2-4x+2＞0
    2^n>n^50
    2^n>1
    20.5+79x<19.95+86x
    25+88.5x <26+86x

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