x^2+0.11*x=0.01269
    a×0.6=29.9
    a×0.6=20.9
    a×0.6=31.8
    a×0.6=19.8
    a×0.6=29.9
    a×0.6=20.9
    a×0.6=11.9
    a×0.6=31.8
    a×0.6=19.8
    a×0.6=10.9
    25X²-236X+168＝0
    0.005x=x-597
    0.5%=（597-X）/597
    25%=（300-X）/300
    -15%=（345-X)/345
    10%=（450-X）/450
    x*ln(x)-e2=0
    x*ln(x)-e=0
    x*ln(x)+e=0

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