0.03^n <= 0.01
    0.02^n <= 0.01
    0.01^n <= 0.01
    0.01^n <= 0.001
    0.02^n <= 0.001
    0.98^n <= 0.001
    0.98 ^ n <= 0.001
    0.8^n <= 0.001
    (2x-1)/(x+2)<1
    abs(x^2-5x+5)<1
    sqrt(4x-x^2)
    (187.31-X)/X<77.234/185
    （187.31-X）/X<42.31/185
    -4082750+3000000+X-X*0.1/4-450000≥300000
    550a+(700-55a) /45*495<7370
    234=124
     (2x+3)/(x-3) >(6x-5)/(3x+1)
    (2x+3)/(x-3)>(6x-5)(3x+1)
    x-188+x-219=311
    2.226=X-9.0/20.9-X

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