(2.56×4.14)/(2.56+49.76)
    387.65- 110.79
    250.45-63.75
    148.42- 134.34
    121.29- 117.29
    171.45-77.03
    64.94-39.07
    18.8×3.31×1.72+2×24.4×1.32
    2×24.6×1.32
    (20+16.2×4. 14+18.8×5.42)×0.61-2×24.2×0.79
    (20+16.2×4. 14+18.8×2. 11)×0.61-2×24.2×0.79
    (20+16.2×4. 14)×0.61-2×24.2×0.79
    -20*lg(0.1*15.76)
    0.24×1.43/360=
    0.7×1.43×800×1042=
    =0.25×1×14.3×800×1042=
    (193.19×1.7×1.25×1.1)/2
    (63.97×10^6)/(360×0.997×1042)=
    (1+√(1-2×0.0052))/2=
    1/12×1.25×1.1×193.191×〖1.7〗^2=

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