(169.5×7.4+307.054×3.3+66.8×0.66)-(14.672×1.59+210.38×0.7+193.191×7.49+109.24×5.19)
    (169.5×7.4+307.054×3.3+66.8×0.66)-(14.672×1.59+210.38×0.65+193.191×7.49+109.24×5.19
    (169.5×7.44+307.054×3+66.8×0.66)-(14.672×1.59+210.38×0.65+193.191×7.49+109.24×5.19)
    (169.5×7.44+307.054×3.3+66.8×0.66)-(14.672×1.59+210.38×0.65+193.191×7.49+109.24×5.19)
    4.6+4.3+1.39-5.1
    4.6+4.3+1.39-2.8
    (2×40.539+55.58)/(3×(40.539+55.58))×1.39
    (2×47.539+95.277)/(3×(47.539+95.277))×4.3+1.39
    1/3(4.6-(-0.651))+(4.3+1.39)=
    (2×123.86+177.829)/(3×(123.86+177.829))×1.39
    (2×30.72+27.74)/(3×(30.74+27.74))×(4.6+4.3-8.5)+1.39
    (123.86+178.85)/2×1.39
    40.534*1.39+5.412*1.39*1.39
    123.86+38.827*1.39
    40.534+10.824*1.39
    40.534+10.824*1.4
    (169.5×7.91+307.054×3.77+94.12×0.868)-(14.672×2.06+265.5×0.85+193.191×7.96+109.24×5.66)
    18.2×(4.6+4.3-8.5)×1.894+2×40×1.376
    64.559/(2×(4.6-(0.651)))
    (47.539+95.277)/2×4.3

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