(20+18.8×1.5)×2.04+2×17×√2.04
     (20+18.8×1.2+18.8×6.8)×3.54+2×0×√3.54
    (20+18.8×1.2)×3.54+2×0×√3.54
     (20+18.8×1.2)×2.04+2×17×√2.04
    (20+18.8×1+18.8×7.5)×3.54+2×0×√3.54
    (20+18.8×1)×3.54+2×0×√3.54
    arctan0.269662921348314
     (20+18.8×1.0)×2.04+2×17×√2.04
    360956160/4.13
    60×313.33×1×(8×300×8)
    -14/5
    √((4-1.652)/3×(1-1.905)+1.905/1.652)
    [24×(tan29.974-tan20.562)+99×(tan23.32-tan20.562)]/2/π
    [24×(tan29.974-tan20.562)+71×(tan23.32-tan20.562)]/2/π
    [24×(tan29.974-tan20.562)+99×(tan23.32-tan20.562)]/2π
    [24×(tan29.974-tan20.562)+71×(tan23.32-tan20.562)]/2π
    arccos[99×cos20.562/(99+2×1×cos14)]
    arccos[24×cos20.562/(24+2×1×cos14)]
    (7.2×(2×6.9-7.2/2)/16+7.2×(2×6.9-7.2/2)/16+7.2^2/16+7.2^2/16）×2+（(7.2×2-2.4)×2.4/8+(7.2×2-2.4)×2.4/8)×2
    (7.2×(2×6.9-7.2/2)/16+7.2×(2×6.9-7.2/2)/16+7.2^2/16+7.2^2/16+(7.2×2-2.4)×2.4/8+(7.2×2-2.4)×2.4/8)×2

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