1/2（x+1）-1<3/x
    x-4≤2/3（2x-1）
    (2x+1)/3≤－(x+5)/2
    -3x+9-6/x>0
    85y<=364+100*1.44y-640
    2x^2-5x-3<0
     (1+x)^2≥1.10
    2797.44x^5+120734.11x^4+843633.52x^3-8044670.98x^2-41634964.9x+189300302.1>0
    85%+90%（800-x）≥88%X800
    x+23.44x∧(5÷12)≥357.1
    x+x∧(5÷12)≥357.1
    abs(x^2-2x+5)≥0
    abs(x^2-2x+5)>0
    10p^5-24p^4+18p^3-4p^2＞0
    10p*p*p*p*p-24p*p*p*p+16p*p*p-4p*p＜0
    10p*p*p*p*p-24p*p*p*p+16p*p*p-4p*p＞0
    5p*p*p-12p*p+8p-2＞0
    (x-3)/(x+4)>=(x+2)/(x-5)
    -12n^3-40n^2-630n/64n^2+224n+4016>0
    C(8,m-1)<7168

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