2X-(10-X)=6
    2X+(10-X)=6
    2X+10-X=6
    x-（1-x）=297
    x-0.1x=297
    x-0.01x=297
    x+x*0.01=8086.5
    150=15x+x^2
    √(1/x)=sin(x/2)
    √(1/x)=sin(x/2)
    a×0.6=21.9
    a×0.6=7.9
    a×0.6=12.9
    a×0.6=7.9
    a×0.6=37.9
    a×0.6=10.6
    a×0.6=9.6
    58.7/74.5=(250x/(x+250))/450+250/(x+250)
    a×0.6=26.9
    a×0.6=30.9

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