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    (s-7)/s >0.55
    (2x-1)(3x+4)>0
    x^2-x-2>0
    (58x1+58x2+65.25x3+45.75x4)/(x1+x2+x3+x4)>=58 (1.2x1+0.2x2+0.25x3+0.75x4)/(x1+x2+x3+x4)<=1.3 (0.03x1+0.1x2+0.003x3+0.1x4)/(x1+x2+x3+x4)<=0.1 (0.2x1+0.2x2+0.25x3+0.75x4)/(x1+x2+x3+x4)<=1.2
    (2x-1)^2>(x+2)^2
    16x+4(600-x)<=7000
    2z+4<=28 30z+18(2z+4)>=699
    sqrt(16a^2+20a)/a<6
    3.2 * X × 1.45 × 1.24 <3.5 * X × 1.45 × 1.15
    3.2X×1.45×1.24<3.5X×1.45×1.15
    3600≤(-200x+4400)(x-13)
    0.2×0.9×x/(0.2×0.9×x+0.3×0.1×x+0.5×0.5×x)>=0.9
    0.2* 0.9^x/(0.2* 0.9^x+0.3*0.1^x+0.5*0.5^x)>=0.9
    -0.69582*x^2+9.47865*x+1.03581>30.65
    -0.69582*x^2+9.47865*x+1.03581>37
    0.69582*x^2+9.47865*x+1.03581>37
    2x-4/4≤14-16/4x
    -4082750+3000000+X-450000-X*10%/4>300000
    50z+80(500-z)<=34000
    5x+2>3(x-1) x/2-1<=7-3x/2

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