( ( 1.3045 * b + 2.3624 ) - 11.61828 ) ^ 2 + ( ( 2.0173 * b + 3.6418 ) - 18 ) ^ 2 <0.0005
    ( ( 1.3045 * b + 2.3624 ) - 11.61828 ) ^ 2 + ( ( 2.0173 * b + 3.6418 ) - 18 )^2 <0.0005
    ( ( 1.3045 * b + 2.3624 ) - 11.61828 ) ^ 2 + ( ( 2.0173 * b + 3.6418 ) - 18 )^2 <0.00005
    ((1.3045*b+2.3624)-11.61828)^2+((2.0173*b+3.6418)-18)<0.00005
    -100x-2400+x^2>0
    100x-2400+x^2>0
    100x-2400-x^2>0
    -240-10x-0.1x^2>0
    2*absx-1>0
    －1＜1－[√（2a）]/a＜0
    —1＜1－[√（2a）]/a＜0
    4≤4x+78-8（x-1）
    4x+78-8(x-1)＜8
    4≤4x+78-8(x-1)
    x²+x-1<0
    x²+3x+4>0
    x²+6x+9≤0
    -3x²-2x+1<0
    3x²-7x-6≥0
    (-2k-1)^2-4*4*(k-0.5)>0

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