40-2x≤18
    (2x+1)^2-x^2>0
    -4+x-x^2≤0
    4x^2+4x+1≥0
    1-[1-（137475/17721088）^x]^28520991≥80%
    1-[1-（7695/17721088）^x]^28520991≥80%
    1-[1-（162/17721088）^x]^28520991≥80%
    x-x^2+6≤0
    1-[1-（15/17721088）^x]^28520991≥80%
    x^2+2x-3≤0
    1-[1-（15/17721088）^x]28520991≥80%
    1-[1-（15/17721088）x1]28520991≥80%
    432（1+x）^2≤25%x
    432（1+x）^2≤25%
    m^2+4m+3<0
    －12x∧3+27x∧2+162x+295≥0
    2(x+3)-4x<-(x-1)
    (2x-1)/3-(5x+1)/2≤1
    4X>X－7/2
     ( 2 × ( t-0.6) + 0.8 × 11.5 ) × ( 8.3* t + 91.49 ) / ( 13.9 + t ) ≥1.6 × 11.5 × 10

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