2+x/2≥2x-1/3
    3（x-1)<5x-2
    x^(2)+x≤2
    x＋1<0
    (x+2)(x-3)<6
    -3x^2-11x+4>0
    1÷3-4x≤1÷2x-3
    1≤1÷1-x≤2
    4x^2+8x+4≤0
    3x^2-8x+8≥0
    3x^2-4x+1≤0
    abs4-x≥-2
    -abs3-2x≤5
    (x-1)^4x^2(x+1)^6÷(x-3)^3(x+4)^5≤0
    (9-x)^55(10-x)^66(12-x)^77÷(7-x)^30(8-x)^40 = ≥0
    (x-2)^5(x^2-2x-3)÷(x-1)(x+1)^3≥0
    (x-2)^5(x^2-2x-3)÷(x-1)(x+1)^3
    (9-x)^55(10-x)^66(12-x)^77÷(7-x)^30(8-x)^40
    5-2x÷3≥-1÷2
    14.01+X-X*6%/12≥20

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