2x-3>4(x+5)
    ( x + 2) / 2 > ( x + 3 ) / 3
    （x+3）/2>（x+3）/3
    3+x÷2>x+3÷3
    3*x*x-10*x+3<0
    x(x-1)(x+1)>0
    x+2+3/4>0
    4^(k-1)/!(k-1)>0.9*e4
    x+11.42x^0.4≥558.98
    2a2-3a+216>0
    abs(x+1)
    1.5≤-7.5x
    x^2-6x+8>=0
    -a^-1<3
    x^2-3x-2＞0
    (1.8^a/!(a))*e-1.8>0.99
    550*x+(700-55*x)*495/45<=7370
    (ln(1/(1-x)))/x<2
    8.25x^2-15x+9<=0
    4/(2m-2)<0

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