-0.03
    -0.03<(37.573*x^(-8*10^(-4)))-(37.573*(x-180)^(-8*10^(-4)))
    -0.03<(37.573*x^(-8*10^(-4)))-(37.573*(x-180)^(-8*10^(-4)))
    x（x+2）²>0
    -x²+x>0
    -x²+x>0
    4x+90>0
    2^7-2x>0.5^-x2-4
    2^7-2x>0.5^-x2-4
    2^7-2x>0.5^-x2-4
    n∧2-n＞2∧50
    4k（4k-5）<0
    -2<1/-2m<1
    3x≥4-2x
    6X^2+12X＞0
    0.22×1×0.7×x÷2.9≥50
    0.22×7×0.7×x÷100≥100
    0.22×1×0.65×x÷100≥50
    0.22×1×0.65×x÷100≥75
    0.22×1×0.7×x÷100≥75

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