(((283.48-256.03+0.86)/256.03)+((275.76-283.48+0.21)/283.48)
    (283.48-256.03+0.86)/256.03
    0.32×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+20)+10×4.5
    0.32×(18.7×3.9+19×5.3+9.4×1.4+20)+10×1.4
    0.283×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+10.7×6.2+20)+10×10.7
    0.283×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+20)+10×4.5
    3.537×(10.1×2.7+10.7×6.2)+10×8.9=
    3.537×2.7×10.1+10×2.7=
    2+3=
    cos1.10125
    cos0.845
    sin1.69
    sin1.48719
    sin2.2025
    3.124×2.7×10.1+10×2.7
    3.124×3.1×10.1+10×3.1
    80*1000*40 = 80*1000*38 =
    650/16.163 = 650/16.195 = 650/16.325 = 650/16.455 =
    (1+6%)e2
    1600/(1+6%)e4-(1+6%)e2

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