－x²－x＋2＞0
    x²＋2x＋1≤0
    1/X＜8
    1/6^x>0.9
    344*8cosxcosx>800sinxcosx-25*9.8>0
    800sinxcosx-25*9.8>0
    sinxcosx-25*9.8>0
    X²-7abs(x)+10≤0
    x^2+1<0
    x^2+1<0
    lnx＞x-1
    x^2>2x+1
    326.86055+1010.10418X>330
    41.90369-40.66421X>34
    41.90369-40.66421X>34%
    326.86055+1010.10418X>330 41.90369-40.66421X>34%
    [(2-t)^3-t^3]*t*(2-t)^2<0
    x2+8x-1>=-1
    -a-1-sqrt(8a+8)/2>-12
    -a-1+sqrt(8a+8)/2<-1.5

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