-90-arctan(0.12×1.3)-arctan(0.02×1.3)-arctan(1/0.205×0.1.3)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3) =
    -90-arctan(0.12×0.205)-arctan(0.02×0.205)-arctan(1/0.205×0.205)-arctan(1/23.894×0.205)+arctan(1/1.3×0.205)+arctan(1/7.073×0.205) =
    -90-arctan(0.12×0.205)-arctan(0.02×0.205)-arctan(1/0.205×0.205)-arctan(1/23.894×0.205)+arctan(1/1.3×0.205)+arctan(1/7.073×0.205) =
    -90-arctan(0.12×0.1)-arctan(0.02×0.1)-arctan(1/0.205×0.1)-arctan(1/23.894×0.1)+arctan(1/1.3×0.1)+arctan(1/7.073)×0.1 =
    0-44444+9992
    3+8677
    3+8
    -arctan0.1×0.1-arctan0.01×0.1-arctan(1/0.375)×0.1-arctan(1/84.85)×0.1+arctan(1/3)0.1+arctan(1/10.61)×0.1 =
    （48.9735-48.9671）/（50*0.0011996824）
    9.58*（14.8+4.46+13.4+16.14+16.96）+（14.8+16.14）*16.96+16.9*2-3.14*3.14*3.14
    90-atan（0.2×0.12）atan（0.02×0.2）
    0¼/0¾
    6.3*1.5+1.33*0.75
    6.3*1.5+1 1/3*0.75
    -90-arctan0.12×7.073-arctan0.02×7.073-arctan(1/0.205)7.073-arctan(1/23.894)7.073＋arctan(1/1.3)7.073＋arctan(1/7.073)7.073=
    -90-arctan0.12×300-arctan0.02×300-arctan(1/0.205)300-arctan(1/23.894)300＋arctan(1/1.3)300＋arctan(1/7.073)300=
    -90-arctan0.1×300-arctan0.01×300-arctan(1/0.375)300-arctan(1/84.85)300＋arctan(1/3)300＋arctan(1/10.61)300=
    -90-arctan0.1×200-arctan0.01×200-arctan(1/0.375)200-arctan(1/84.85)200＋arctan(1/3)200＋arctan(1/10.61)200=
    -90-arctan0.1×100-arctan0.01×100-arctan(1/0.375)100-arctan(1/84.85)100＋arctan(1/3)100＋arctan(1/10.61)100=
    -90-arctan0.1×90-arctan0.01×90-arctan(1/0.375)90-arctan(1/84.85)90＋arctan(1/3)90＋arctan(1/10.61)90=

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