((-x^2+3x-4)÷(2x)+x)((-x^2+3x-4)÷(2x)-x) <0
    ((-x^2+3x-4)÷(2x)+x)((-x^2+3x-4)÷(2x)-x)<0
    ((-x^2+3x-4)÷2x+x)((-x^2+3x-4)÷2x-x)<0
    sqrt（60h-h^2）＜39.56
    sqrt（60h-h^2）＞39.56
    60*h-h^2＞1565
    2π/w*3/4>7π/10 2π/w*5/4<17π/10
    2π/w*3π/4>7π/10 2π/w*5π/4<17π/10
    2π*3π/4>7π/10 2π/w*5π/4<17π/10
    π/w>7π/10 2π/w<17π/10
    π/w>7π/10
    -0.15x＞-50
    -1.85x＞-50
    x-0.15x+50＞x
    200*135+190*6 (x+((200)/(x)))<70000
    200*135+190*6 (x+((200)/(x)))<700
    -x ^-x+12小于等于0
    -4114150+300000+X-450000-X*10%/4>=300000
    -4114150+300000+X-450000-X*10%/4>300000
    1.1^n>50

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