3.98×6.9/2+(7.2×(2×6.9-7.2/2)/16+7.2×(2×6.9-7.2/2)/16+7.2^2/16+7.2^2/16+(7.2×2-2.4)×2.4/8+(7.2×2-2.4)×2.4/8)×4.6
    3854.56^(1/2)
    （126.12-116）^2×10+（126.12-120）^2×18+（126.12-124）^2×23+（126.12-128）^2×21+（132-126.12）^2×18+（136-126.12）^2×6+（140-126.12）^2×4
    3.98×6.9/2+(7.2×(2×6.9-7.2/2)/16+7.2×(2×6.9-7.2/2)/16+7.2^2/16+7.2^2/16+(7.2×2-2.4)×2.4/8+(7.2×2-2.4)×2.4/8)×4.9
    arccos-1
    arctan-2
    1/647.98×1/3 [2.89×(3.8+1.525-0.857)+84.06×1.8+89.38×1.475+471.65×6.75]
    (52.1087+87.6407)×6.75*0.5
    (53.8+67.39)×1.475*0.5
    (53.8+67.39)×1.475
    (30.01+63.39)×1.8*0.5
    (30.01+63.39)×1.8
    8.65×(1.525-0.857)*0.5
    1/2×[8.65×(1.525-0.857)+(30.01+63.39)×1.8+(53.8+67.39)×1.475+(52.1087+87.6407)×6.75]
    (20+18.5×1.525+19.8×3.8+19.4×1.8+18.8×1.475+18.8×6.75)×0.28-2×0×√0.28
    (20+18.5×1.525+19.8×3.8+19.4×1.8+18.8×1.475)×0.28-2×0×√0.28
    (20+18.5×1.525+19.8×3.8+19.4×1.8+18.8×1.475)×0.49-2×17×√0.49
    (20+18.5×1.525+19.8×3.8+19.4×1.8)×0.49-2×17×√0.49
    (20+18.5×1.525+19.8×4.8+19.4×1.8)×0.61-2×29×√0.61
    (20+18.5×1.525+19.8×43.8+19.4×1.8)×0.61-2×29×√0.61

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