26700 + X - ( 10 % / 4 ) * X ≥50000
    26700+X-(10%/4)X≥ 50000
    26700+X-(10%14)X≥ 50000
    8138+153.92*X＜751.71*X
    -lnx/x²＞0
    2.5 <-4.256x^3+181.748x^2-2663.508x+15354.783 <3584.345
    2.5 <-4.256x^3+181.748x^2-2663.508x+15354.783 <5522.2792
    2.5<-4.256x^3+181.748x^2-2663.508x+15354.783<4591.1203
     8575+153x < 751x
     8575+153.92x < 751.76x
    (3x-1)/2-7/3>=x-(5+2x)/2
     -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <166.13
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <165.24
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <164.32
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <163.39
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <162.43
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <161.45
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <1682.37
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <1492.84
    -4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <1303.31

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