2×26×1.4+1×24×1.2
    64.45-13.3-32.19
    439.25-19.87+389.78
    525.25+60+39.87
    10-6.3-2.19
    6.7+13.43+15.75
    388.3-69.53+8.93
    388.3-69.53+8.93
    √((9.09×238)/(1000×1.12))+0.3
    √((9.09×238)/(1000×1.12))
    0.0347×77×〖9.2〗^2
    0.0508×77×〖7.8〗^2
    2×26+1×25
    √((9.09×237)/(1000×1.12))
    0.0508×77×〖7.8〗^2
    √((9.09×200)/(1000×1.12))
    √((9.09×200)/(1000×1.05))
    0.0347×65×〖9.2〗^2
    0.0508×65×〖7.8〗^2
    （4500000-1500000）*2.5%*2

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