m2＋2m＜2
    sin(x)<1
    sin(x)<0.927
    sinx>1
    (1+1/x)^x
    2^x＞x^4
    85<170/3+(1/3)x<=90
    85<=(83+87x)/3<=90
    3(2+x)>=2(2x-3) [1/3(4-x)]<=5
    7(x-1)<4x+3 6(0.5x+1)>=2x-5
    -3/2<=(5/6)w-3/4<=2
    (y-2)/2-5<=3 (1+2y)/3>=41
    2x-3(x-1)<2 2/x+5>=x
    2x3(x-1)<2
    3>-0.25v>-2.5
    3r+2<5 7r-10>60
    3+2<5 7r-10>60
    5z+3<-7 -2z-6>-8
    4<=y+2<=-3(y-2)+24
    9-c<2 -3c>15

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