3x-4>24-3x
    2x+9>11
    2x+3≥7
    35r−21<−35r+19
    8x+31<23
    4x−39>−43
    5x−83≥−73
    −25x+175>225
    17x−16>18
    3x−91>−87
    (1-x)^3(x+3)^2(x+4)^4>=0
    (1-x)^3(x+3)^2(x+4)^4<=0
    (x-1)^2(x+3)^3(x+4)^4<=0
    (x-1)^2(x+3)^3(x+4)^4<=0
    1+2＞3x-3
    （x-2）^2-4＜0
    (1-x)^3(x+3)^2（x+4)^4<0
    (x-1)^2(x+3)^3(x+4)^4<0
    2x+3≥x+11 2x+5/3-1<2-x
    (29+x)/(42+x)>0.9

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