-5-2abs(3x-6)<-8
    -5-2abs(3x-6)<-8
    3-2abs(4x-5)>=1
    4-5abs(-2x-7)<-1
    -2-3abs(4-2x)>8
    4x+1＜3x+2
    4-6abs(-6-3x)<=-5
    x+2<3
    0<50(1^2-n^3)^2
    0<50(4^2-n^3)^2
    0<50(3^2-n^3)^2
    0<50(5^2-n^3)^2
    0<50(25^2-n^3)^2
    0<50(50^2-n^3)^2
    0<50(100^2-n^3)^2
    0<50(200^2-n^3)^2
    0<50(20000^2-n^3)^2
    0<50(2^2-n^3)^2
    0<50(n^2-n^3)^2
    80(20-x)+96x>=1800

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