(a+1)/2>=(3a-12)/11
    (2y-3)*1/7>(y+4)*1/3
    (2y-3)/7>(y+4)/3
    x>7-(3x-1)/7
    b/3+1/3-(2b-1)/5<0
    (x-192)/(x*1500)*100<0.03
    (7000+2601.12+0.06*x)*2.4≥26407
    (7000+2601.12+0.06*x)*2.3≥26407
    （7000+2601.12+a*0.06）*2.3≥26407
    （7000+2601.12+x*0.06）*2.3≥26407
    （7000+2601.12+x*0.06）*230≥26407
     -4082750 + 3000000 + x - x * 10 % / 4 - 450000 ≥300000
    （696+x）/（724+x）>0.97
    （724+x）/（696+x）>0.97
    (x+5)/3<2x
    2（x+1）>3x-1
    x+2>3
    4（x+1）≤7x+13
    (2x-1)<6x/(x*x+1)
    (2x-1)*(x*x+1)＜6x

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