ln(ex)>0
    3x-1 >5
    8a^3-12a^2+2＞-2
    （4m）^2+16m＜0
    !(x)＞5
    24/31<80/x<7/9
    3m＜0
    3(2x+1)+(-2)(1+5x)＜4
     72y+64.8(40-y)-2400 >=282
    4x+5>1 ((1/3)x)+1>2(x-2)
    22-5x+6<12
    50N11+30N21+20N31>=100 50N12+30N22+20N32>=200 50N13+30N23+20N33>=90 50N14+30N24+20N34>=120 N11+N12+N13+N14<=5 N21+N22+N23+N24<=8 N31+N32+N33+N34<=10
    0.861*10^5*（26.6^1.74/X^4.74）*440*0.390 ≤ 0.2*20
    0.861*10^5*（26.6^1.74/X÷4.74）*440*0.390 ≤ 0.2*20
    0.861*10^5*（26.6^1.74/X÷4.74）*440*0.390<=0.2*20
    2<=x<=2
    x>2 x<2
    x>2 x<2
    0.948*10^5*(42.66^1.77/X^4.77)*216*0.393<0.2*30
    4*x+28-5*(x-1)<5

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