205.67+139.738+20=
    160.583+139.738+20=
    =0.7×9.8×（28.7-8.33）=
    0.655×314=
    （0.575×5.24+0.45×1.67+0.7×17.49+0.65×4.3）/28.7=
    314×(tan(45+15.738/2)*tan(45+15.738/2))+2×12.827×tan（45+15.738/2）=
    314×(tan(45-15.738/2)*tan(45-15.738/2))-2×12.827×tan（45-15.738/2）=
    （8×5.24+7×1.67+14×17.49+16.2×4.3）/28.7=
    （22×5.24+30.8×1.67+12.9×17.49+13.8×4.3）/28.7=
    17.8×5.24+19.2×1.67+17.8×（8.33-1.67-5.24）+（17.8-9.8）×（17.49-8.33+1.67+5.24）+（17.9-9.8）×4.3=
    157.45+142.55+20=
    121.142+142.55+20=
    0.7×9.8×（24.25-3.47）=
    0.689×228.52=
    （0.7×19.11+0.65×5.14）/24.25=
    228.52×(tan(45-13.091/2)*tan(45-13.091/2))-2×14.466×tan（45-13.091/2）=
    228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan（45+13.091/2）=
    228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan（45+13.091/2）=
    （14×19.11+16.2×5.14）/24.25=
    （12.9×19.11+13.8×5.14）/24.25=

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