e∧x≦0.18
    e∧[－πx/√（1－x∧2）]≦0.18
    e（－πx/√（1－x∧2））≦0.18
    e(－πx/√1－x∧2)≦0.18
    -2-2x≥4
    n^2－2n－2016<0
    8/X<9/(X+1)
    5/X<6/(X+1)
    sqrt(a^2-a-2)-a<0
    -sqrt(a^2-a-2)-a>0
    sqrt(a^2-a-2)-a>0
    9x^2-6x+2>0
     -2x＾2-x-1/x＾2+2x-3 ≥0
    -2x＾2-x-1/x＾2+2x-3≥0
    3x＾2-3x+1＞-3/2x＾2
    x＾2-x+1＞1/3x（x-1）
    7.175x^3+43.196x^2-154.26854x-483.4775>0
    7.175x^3+43.196x^2-112.964x-321.06626>0
    7.175x^3+43.176x^2-8.792x-27.8303>0
    7.715x^3+32.884x^2-27.63x-30.393>0

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