0.4138264
    0.264241
    0.26424
    0.2642411177
    4.645751
    5/1
    3.1415927
    3.1415936
    0.9|58
    0.0009|125478
    12.548
    11115615.5425249
    0.35
    -94.890791
    4.376096 3760832 19767728 30-18x=11-2x+7-20
    4.376096 2553760832 19767728 30-18x=11-2x+7-20
    4.1415
    13.24
    314.624：196.64
    18.16263741

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