4x^2+79x≥43.57
    4x^2+79x≥21.6*338.31/92.4
    4x^2+79x≥82.75
    5x-4≥2+7x
    0<0.5-(0.01(2-0.02)x)/(4*0.04*(1-x))<1
    0<0.5-(0.1(2-0.02)x)/(4*0.04*(1-x))<1
    -0.05
    （16/（0.5A-0.03））+(20/(0.5A-0.02))≤(25/0.05)
    （16/（0.5A-0.03））+(20/(0.5A-0.02))≤(35/0.05)
    3cos(x)>2(sin(x)^2)
    (（1.9343+0.203*x)*10^6)/((47x^2)/6)<16
    (（1.9343+0.203x)*10^6)/((47x^2)/6)<16
    （1.9343+0.203x)*10^6/(47x^2/6)<16
    a^2+3a-7>0
    -16+16*10000*(-1+0.02)*0.04+(10000*(0.06*x*(-2+0.02)+2*0.04*(-1+x))^2)/(0.04-0.04*x)>0
    3-2x<5
    (16/（0.5a-0.03））+（20/（0.5a-0.01））≤700
    3+x<10
    (25/（0.5a-0.1））+（16/（0.5*0.29-0.01））≤350
    (25/（0.5a-0.1））+（7/（0.5*0.3-0.02））≤1600

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