11*9091
    248*40322580645
    249*4016064257028
    249*4016064257025
    251*796812749004
    251*7968127490034
    251*796812749
    251*398406374502
    251*39840637450199203187251
    253*395256917
    127*87489
    1/137
    C(7,3)
    C(8,3)
    C(6,3)
    C(9,3)
    （179.9-149.9/160*120）/60
    (19.19×6.65×3.19+14×3.50)/(19.24×(5.35+6.65)+26.73)
    (19.19×6.65×3.19+14×1.90)/(19.24×(5.35+6.65)+26.73)
    (19.19×6.65×2.19+14×1.90)/(19.24×(5.35+6.65)+26.73)

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