2x>x<4>x^x<56x^-1
    2x>x<4>x
    2x>x<4
    2x><4
    2x>4
    0≤6.46/[1.44x*x-10.56x+18.64]≤√3
    -8≤6.46/[1.44x*x-10.56x+18.64]≤0
    -9≤6.46/[1.44x*x-10.56x+18.64]≤0
    -9≤6.46/[1.44x*x-10.56x+18.64]
    -8≤6.46/[1.44x*x-10.56x+18.64]
    -10≤6.46/[1.44x*x-10.56x+18.64]
    -1000≤6.46/[1.44x*x-10.56x+18.64]
    -1000000000000000000000≤6.46/[1.44x*x-10.56x+18.64]
    -0.00000000000000001≤6.46/[1.44x*x-10.56x+18.64]
    -0.00000000000000001≤6.46/[1.44x*x-10.56x+18.64]≤0
    -0.02≤6.46/[1.44x*x-10.56x+18.64]≤0
    -1≤6.46/[1.44x*x-10.56x+18.64]≤0
    0≤6.46/[1.44x*x-10.56x+18.64]≤1.7
    -1.7≤6.46/[1.44x*x-10.56x+18.64]≤0
    -1.5≤6.46/[1.44x*x-10.56x+18.64]≤0

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