arctan0.35
    sin90
    297.961368/102.4708219
    (3.25*e^(-0.023590))*1+(3.25*e^(-2*0.023590))*2+(103.25*e^(-3*0.023590))*3
    298.464158/102.4708219
    (3.25*e^(-0.02302))*1+(3.25*e^(-2*0.02302))*2+(103.25*e^(-3*0.02302))*3
    3.25*e^(-0.0173550 )+3.25*e^(-2*0.0232060 )+103.25*e^(-3*0.021338)
    3.25*e^(-0.020431)+3.25*e^(-2*0.022891)+103.25*e^(-3*0.021362)
    sqrt126
    sqrt9
    5√6/24
    √10/4
    √6/4
    5√6/24
    [(√2/2)^2+18/16-√20/16-10/16]/[√2*√(18/16-√20/16)]
    √2√(18/16-√20/16）
    (√2/2)^2+18/16-√20/16-10/16
    √2*(7-2*√15)/16*√(18-√20)
    √2(7-2√15)/16√（16-√20）
    (5.4056*10^10)/449

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