23➗7
    1234.00×［1-1/（1+8.0%）^21.05］
    9717.00×80%+3731.00×20%
    1174.61×［1-1/（1+8.0%）^25.79］
    2.4×2.2×0.9×21
    2.4×2.2×0.9×20
    2.4×2.2×0.9×21
    95.74/（2.4×2.2×0.9）
    99.792/95.74
    2.4×2.2×0.9×21
    114.048/95.74
    2.4×2.2×0.9×24
    (41.51+544.44+103.78+166.04)×1.1
    994.9[tan(arccos0.88)-tan(arccos0.95)]
    994.9[tan(arccos0.88)-tan(arccos0.95)]
    994.9[tan(arccos0.88)-tan(arccos0.95)]
    24.4*2+22.8*2
    (2187.7×10^3)/(0.995×20479.8×215)+(1.0×144.2×10^6)/(1.05×2865986.06×(1-(0.8×2191.5)/1508080.55)×215)
    (41.51+559+103.78+166.04)×1.1
    29116.4 + 7283.30 + 7115.20 + 29150.8 + 14379.2 + 7155 + 3465.35

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