m^-5m-14＞0
    400x+280(5-x)<=1900
    m-5(m-80)/3+5<5
    3n+80-5n+5<5
    8x-21>35
    2x-3<=35
    4x-9<=35
    -4<=4-m<8
    1-x>=2
    1/5*x-2<=4-2/5*x
    5(x-9)>=15-6(x-1)
    4x+5>7x-31
    (3z+7)/3>=(2z+13)/3
    1/7*y-8>=-12
    0.42x<=-0.84
    3/2x-2<7
    2x^2-x-2<0
    2x^2-x-2>0
    0.7^x<0.05
    0.7^n≤0.05

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