Mathematics
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    21.19+19.5×4.8
    0+19.8×1.07
    248.63×0.602-2×42.0×0.776
    233.19×0.602-2×42.0×0.776
    233.19×0.646-2×26.3×0.804
    139.59×0.646-2×26.3×0.804
    233.19+19.8×0.78
    139.59+19.5×4.8
    26.73+19.8×5.7
    (19.15×6.866×3.76+43.3×10.67)/(18.93×(4.634+6.866)+26.73)
    [2046×(1+0.0518)×1.1215×1.3612+0]×0.9647
    [1-1/(1+6.50%)^48.53]/[1-1/(1+6.50%)^70]
    (81.3×10^3)/9699
    (107.4×10^6)/362000
    (1667.91×2.858)/(416.65×4.148)
    150.46×1.668+2×43.3×1.292
    47.5+19.8×5.2
    243.55×0.60-2×43.3×0.774
    140.59+19.8×5.2
    (19.15×6.65×3.76+43.3×10.67)/(18.93×(3.7+6.65)+26.73)

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