4×28900
    112.5/4
    √((97.05/1.22)^2+〖10.04〗^2 )
    (94.1×10^3)/9369.5
    (92.0×10^6)/948000
    (92.0×10^6-0.4×200.8×10^3×300)/(0.4×0.9×0.78×300×300)
    (94.1×10^3-0.3×200.8×10^3)/(0.9×0.55×300)+(92.0×10^6-0.4×200.8×10^3×300)/(1.3×0.9×0.78×300×300)
    (4.0-0.08×25) √(23.1/300)
    √((27.66/1.22)^2+〖12.97〗^2 )
    (189.6×10^3)/(4×7×522)
    (55.82×10^6)/2017770.13
    (55.82×10^6)/3227877.12
    (189.6×10^3×168)/(624368474.23×2×10)
    (189.6×10^3×1514934.4)/(624368474.23×2×10)
    (55.82×10^6)/(1.05×1604235.55)
    (55.82×10^6)/(1.05×3655553.13)
    √((47.4/253.23)^2+(77.53/408.5)^2 )
    (55.82×10^6×180)/129600
    189.6/4
    (209×10^3)/(0.972×10239.9×215)+(0.85×12.5×10^6)/(1.05×401449×(1-(0.8×209)/33161.77)×215)

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