Mathematics
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    m²+3m-28<0
    m²-8m+15<0
    85x+85(20-x)<=1480
    -x^2-1/6x-1/3≤0
    57x^2-2150x+11400≤0
    (50+10*x)(200-10*x)>15000
    (50+10x)(200-10x)>15000
    x+4x+5>1
    abs(4-3x)<11
    (x-5)╱(x-3)≤0.5
    (2x-1)╱(x+2)≥3
    (x-2)╱(x+1)≥0
    (x-1)╱x≤0
    x[30-2(x-15)]≥400
    (6-x)(8-x)≤24
    x÷x+3≥0
    3÷x-5≥0
    x∧2-25x-200≤0
    -1-2x/x-3≥-1
     x < sin [( π * x) / 4 ] + 1 / 6

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