Mathematics
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    (8×2.31+7×3.47+14×17.37+16.2×3.59)/26.74=
    (22×2.31+30.8×3.47+12.9×17.37+13.8×3.59)/26.74=
    17.8×2.31+19.2×3.47+17.8×(6.88-3.47-2.31)+(17.8-9.8)×(17.37-6.88+3.47+2.31)+(17.9-9.8)×3.59=
    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)=

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