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
    1.1^n>100
    ln ( 5 * x + 3 ) ≥0
    3x+50<1.2x
    3x+50<1.2x
    m²＜16
    （x+1）（2x+1）＞0
    1000*x+(1-x)*201000＞2000*x+(1-x)*x*4000+(1-2*x+x^2)*204000
    1000*x+(1-x)*201000＜2000*x+(1-x)*x*4000+(1-2*x+x^2)*204000
    199000*x＞198000*x+(1-x)*x*196000
    201000*x+(1-x)*1000＞202000*x+(1-x)*x*204000

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