(2(x-1))/3≤(3(x+4))/2-5
    10352000÷2÷x＜3600
    (x+1)(x^2+x-2)^2019＞x(x^2+x)^2019
    x*x<1
    (n-1)^2019＞n×(n+1)^2018
    40tan a-19.62/（cos a）^2>=13
    -x+4<2x-2
    1<-x+4
    574.9*x/(950000+x)*5-x*0.003 >0.05
    574*x/(950000+x)*5-x*0.003 >0.05
    575*x/(950000+x)*5-x*0.003 >0.05
    576*x/(950000+x)*5-x*0.003 >0.05
    571*x/(950000+x)*5-x*0.003 >0.05
    1-（0.264k+0.368)^2>(0.632-0.264k)(0.368k-1.368)
    x-x*0.1/4>10
    4.9*(x+1) <4+5x
    4.9*(x+1) <2*1+5x
    4.9*(x+1) < 1+ 5x
    570*x/(935641+x)*5-x*0.003 >0.05
    570*x/(950000+x)*5-x*0.003 >0.05

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