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    291.4×0.20
    291.4/4
    1.050-0.932
    (638.1×10^3)/(0.997×31730.1×215)+(0.999×15.6×10^6)/(1.15×7934076.85×(1-(0.8×638.1)/1215794.23)×215)
    0.994×0.994
    1-0.35×√(638.1/2079352.00)
    (π^2×2.06×10^5×20407.8)/(1.1×〖5.57〗^2 )
    (π^2×2.06×10^5×31730.1)/〖5.57〗^2
    1990/357.106
    7.968-1.080
    7.968-1.080
    (177.6×10^3)/(0.989×4851.9×215)+(0.85×41.1×10^6)/(1.05×401449×(1-(0.8×177.6)/70106.92)×215)
    1350/101.698
    12.949-7.683
    (0.9×10^3-0.3×720.6×10^3)/(0.9×0.44×300)
    0.4×720.6×0.883
    491.6/(2.0×2.0)
    0.34×2.0×142.1
    491.6/(2.0×2.0)
    (11.99×10^6)/(0.9×360×755)

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