（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)>1.2
    （1428.30+593.79*x+212.89*x^2+11.5*x^3）/(2449.62+661.7312*x+12.74*x^2+23/18*x^3)>1.2
    （1214.80+593.79*x+212.89*x^2+11.5*x^3）/(2449.62+661.7312*x+12.74*x^2+23/18*x^3)>1.2
    5x+5>2-2x
    (3-x)÷5≤(1-x)÷4
    -3＜2（1+2x）/3≤6
    x+150-x<200
    x+4/2≥-2x+1/3
    (-2x+2)^2-4x(-x+2)＞0
    2x^2-4x+2＞1
    (x-1)^2＞0.5
    (1977.51+852.57*x+225.005*x^2+11.5*x^3)/(2057.45+522.7585*x+14.32*x^2+23*x^3/18)>1.2
    2x+3≥-1
    2(x+7)<7x+34
    12-x>4x-13
    11x-16<10-2x<5x+31
    5-5x>9x-23
    7-4x>-13
    2x-7<7x+28
    3（x+2)≥2（2x-1)

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