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    395.195×(tan(45-14.85/2)*tan(45-14.85/2))-2×14.12×tan(45-14.85/2)=
    395.195×(tan(45-14.85/2)*tan(45-14.85/2))-2×14.12×tan(45-14.85/2)=
    17.8×3.93+19×2.35+17.8×(8.11-2.35-3.93)+(17.8-9.8)×(17.85-8.11+2.35+3.93)+(17.9-9.8)×7.49+(19.1-9.8)×0.69+(19.2-9.8)×1.09+(17.9-9.8)×5.25
    17.8×3.93+19×2.35+17.8×(8.11-2.35-3.93)+(17.8-9.8)×(17.85-8.11+2.35+3.93)+(17.9-9.8)×7.49+(19.1-9.8)×0.69+(19.2-9.8)×0.14
    471.7/(3.35×0.8)
    0.25×1.0×800×555
    0.25×0.8×800×555
    1.0×14.3×3350×34.75×(555-34.75/2)
    1.0×14.3×800×37.95×(555-37.95/2)
    (360×4624)/(1.0×14.3×3350)
    0.8/(1+360/(2.00×10^5×0.00185))
    0.002+0.5×(20.1-50)×10^(-5)
    0.19178082*12=
    800*365=
    0.28767123*12=
    (360×1206)/(1.0×14.3×800)
    428/7
    632/8
    133.5×1×150
    3.14×2.7×1×150×22

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