0.9×0.85×2×0.45×125
    (307.68×1000×1000)/(0.91×1430×1000×205)
    1.07-0.282/1.75
    1.50×4320/(138.41×138.41)×(10200×450)/(1430×1000)×[√(1+((138.41×18)/(4.4×450))^2 )+0]×1
    (4000×18)/(150×450)
    (7000×18)/(150×450)
    (307.68×1000×1000)/(0.66×1430×1000×205)
    (307.68×1000×1000)/(0.5×1430×1000×205)
    arccos0.9136
    0.7811*1.12184/(1.12184-0.7)+0.2105/(1-0.7)+0.0084*0.54176/(0.54176-0.7)=
    0.7811*1.12184/(1.12184-0.8)+0.2105/(1-0.8)+0.0084*0.54176/(0.54176-0.8)=
    0.7811*1.12184/(1.12184-0.9)+0.2105/(1-0.9)+0.0084*0.54176/(0.54176-0.9)=
    0.7811*1.12184/(1.12184-1.1)+0.2105/(1-1.1)+0.0084*0.54176/(0.54176-1.1)=
    0.0116*17.4/(17.4-2.042)+0.5568*7.18/(7.18-2.042)+0.1974*5/(5-2.042)+0.1926*2.17/(2.17-2.042)+0.0356*2/(2-2.042)+0.006*1/(1-2.042)=
    0.0116*17.4/(17.4-1.587)+0.5568*7.18/(7.18-1.587)+0.1974*5/(5-1.587)+0.1926*2.17/(2.17-1.587)+0.0356*2/(2-1.587)+0.006*1/(1-1.587)=
    2.8*0.5*2.5
    2.7*0.5*2.5
    2.8*0.5*4.5
    2.7*0.5*4.5
    6.594*2.4

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