(131.96-4.85×10)×0.374-2×11.4×√0.374+4.85×10
    (74.66-1.85×10)×0.374-2×11.4×√0.374+1.85×10
    (74.66-1.85×10)×0.361-2×16.9×√0.361+1.85×10
    42.65×0.361-2×16.9×√0.361
    17.3×1.85+42.65
    17.3×0.5+34
    34×0.361-2×16.9×√0.361
    175.13+19.3×8.55
    152.09+19.2×1.2
    131.96+18.3×1.1
    74.66+19.1×3
    17.3×2.35+34
    17.3×2.35+34
    17.3×2.35+34
    17.3×2.35+34
    (7/10-1/6+2/7)/7/30
    （7/10-1/6+2/7)/7/30
    （7:10-1:6+2:7）：7:30
    (4500-(2×45+(14-1)×300+12))/2
    4500-2×46

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