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    (307.68×10^3×10^3)/(1430×10^3 )
    (307.68×10^3×10^3)/(1.05×1430×10^3 )
    (450-18-18-13.5-13.5)/11.5
    ((150-11.5)/2-13.5)/18
    (28.01×10^3×58.4×10^3)/(712×10^4×5.5)
    (13.69×10^3×10^3)/(1.05×102×10^3 )
    C(95,5)
    (140-9.1-9.1-7.5-7.5)/5.5
    ((80-5.5)/2-7.5)/9.1
    -30-90
    arctan(5/π)
    (12*50%-4+0.8)/(12*50%-4+0.8-8*4.5%-5*7.5%/75%-2.5*3.6%)
    12*50%-4+0.8-8*4.5%-5*7.5/75%-2.5*3.6%
    (12*50%-4+0.8)/(12.8*50%-4+0.8-8*4.5%-5*7.5/75%-2.5*3.6%)
    (12.8*50%-4)/(12.8*50%-4-8*4.5%-5*7.5/75%-2.5*3.6%)
    4.5%*0.75*8/19.6+7.5%*5/19.6+12.5%0.6/19.6+9.09%*6/19.6
    (1785*148.2%+1446.85*(1+(5+245+310+50)/(1200+245+310+50)))*(1+186.8%)*(1+75.4%+295*0.06%) (1574*148.2%+1446.85*(1+(5+372+310+50)/(1200+372+310+50)))*(1+161.8%)*(1+75.4%+(372+310+50)*0.06%) (1785*148.2%+1446.85*(1+(5+245+310+50)/(1200+245+310+50)))*(1+161.8%)*(1+75.4%+295*0.06%) (1280*148.2%+1446.85*(1+(5+542+310+50)/(1200+542+310+50)))*(1+148.8%)*(1+75.4%+(542+310+50)*0.06%)
    (1785*148.2%+1446.85*(1+(5+245+310)/(1200+245+310)))*(1+186.8%)*(1+75.4%+245*0.06%) (1574*148.2%+1446.85*(1+(5+372+310)/(1200+372+310)))*(1+161.8%)*(1+75.4%+(372+310)*0.06%) (1785*148.2%+1446.85*(1+(5+245+310)/(1200+245+310)))*(1+161.8%)*(1+75.4%+245*0.06%) (1280*148.2%+1446.85*(1+(5+542+310)/(1200+542+310)))*(1+148.8%)*(1+75.4%+(542+310)*0.06%)
    (1785*148.2%+1446.85*(1+(5+245+310)/(1200+245+310)))*(1+186.8%)*(1+75.4%+245*0.06%) (1574*148.2%+1446.85*(1+(5+372+310)/(1200+372+310)))*(1+161.8%)*(1+75.4%+(372+310)*0.06%)
    sqrt((0.01/0.16)^2+(0.01/0.12)^2+(0.02/86)^2+(0.04/39)^2)

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