0.5e^(x)-sinx+2>0.5
    3e^(x)-sinx+2<3
    -0.75e^(x)-sinx+2<-0.75
    -0.75e^(x)-sinx+2<0.75
    -0.25e^(x)-sinx+2<-0.25
    -0.5e^(x)-sinx+2<-0.5
    -3e^(x)-sinx+2<3
    990*x^4-263.7*x^2+7.61≥0
    11*x+9*(10-x)<=95
    300+21*(X-10) < 25.5X
    250*x+210*(30-x) >= 1320
    -4114150+3000000-450000-X-X*0.025≥300000
    -4114150+3000000-450000-x-x*10%/4≥300000
    y/2.4×0.8+24-y/2×0.5≤7
    24/x＞24/x－0.4×5/6
    24/x＞24/x－0.4×5/6
    x-1+sqrt(x^2-8)<0
    x-1<0
    x-1+sqrt(x^2-8)<0
    2x²-x-3≥0

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