-67a^4+2a^6+308a^2
    22=22t+5t^2
    -24a/5-64＜1500/7-200a/7＜24a/5+64
    -24a/5-64≤1500/7-200a/7≤24a/5+64
    （65-40）*x≥14250
    x*ln(x)+17.1*x+3108264.07=0
    m ^ 2 - 5 * m + 6 >0
    m^3-5m+6>0
    3/n-n＜=2
    x>=4*(100-x)
    2-x≤2x+8 x<(x-1)/3+1
    (6x+1)/(2x-1)<1
    e∧πy÷√（1－y∧2）＝0.02
    3-x(x-2)＞0
    (3n-2)(2n+4)(n-6)≤0
    (2x-1)(x-3)≤0
    2x－2/x＋3＜1
    4-x^2<=0
    4-x^2>=0
    2（9-2X1）=3（11-2X2）

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