x∧2-x+1≥0
    -x∧2-3x+10≥0
    -x∧2-3x+10>0
    2x∧2-x-3>0
    5-2（x-3）>6x-4
    5（x-2）+8<6（x-1）+7
    6x-2x≤1-2x
    3[x-2(x-2)]>x-3(x-2)
    3（y+2）-1≥8-2(y-1)
    3-2x≥9+4x
    3x+2<2x-8
    -(x+1)<6+2(x-1)
    2(3x-1)-3(4x+5)>x-4(x-7)
    5(x+2)≥1-2(x-1)
    x+0.4106*x=594824
    x2+16=(8－x)2
    1200000+500*x=800*x
    x∧3
    (2-x)^3-sqrt(x)＝1
    (2-x)^3<2

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