2（2x-1）<5（x+1）
    5x<2（x-1）
    m^2+10m-7>0
    8-5（x-2）<4(x-1)+3
    84<126x^-3
    -1<3x-3-x+2<５
    0<3x-3-x+2<５
    1<3x-3-x+2<５
    3x-3-x+2<５
    x-1<=0 2x+5>3
    x^2+2x-3>0
    (5-x)/2＞1/3
    3901.13－278.65×（2h*h+5.4h+1.645）≤0.7×1.0×1.71×1000×（3h+5.4）h
    3901.13－278.65×（2h*h+5.4h+1.645）≤0.7×1.0×1.71×103×（3h+5.4）h
    -19.8x/392.04＜-1
    （1214.80+686.025*x+212.89*x^2+11.5*x^3）/(2449.62+591.5622*x+12.74*x^2+x^3*23/18)>1
    （1214.80+686.025*x+212.89*x^2+11.5*x^3）/(2449.62+591.5622*x+12.74*x^2+x^3*23/18)>1.2
    （1214.80+686.025*x+212.89*x^2+11.5*x^3）/(2449.62+519.5622*x+12.74*x^2+x^3*23/18)>1.1
    （1214.80+686.025*x+212.89*x^2+11.5*x^3）/(2449.62+519.5622*x+12.74*x^2+23/18*x^3)>1.1
    （1214.80+686.025*x+212.89*x^2+11.5*x^3）/(2449.62+519.5622*x+12.74*x^2+23/18*x^3)>1

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