(104.15×22.38+4.7×34.61)/275.74
    (96.96×22.38+4.7×34.61)/275.74
    (96.96×22.38+4.7×34.61)/75.74
    (25.81×5.4+478.07×3.23+255.94×0.80)/(31.68×6.08+290.68×3.36+154.69×0.84)
    (104.15-5.5×10)×3.215+2×4.7×√3.215
    72.02+18.9×1.7
    (275.74-10.7×10)×0.311-2×4.7×√0.311+(10.7-5.5)×10
    243.61+18.9×1.7
    (25.81×4.4+478.07×2.23+95.37×0.34)/(31.68×5.08+290.68×2.36+66.84×0.35)
    (85.25-4.5×10)×3.215+2×4.7×√3.215
    (72.02-3.8×10)×3.215+2×4.7×√3.215
    (256.82-9.7×10)×0.311-2×4.7×√0.311+(9.7-4.5)×10
    (243.61-9×10)×0.311-2×4.7×√0.311+(9-3.8)×10
    (421.02×5.66+236.81×8.00)/(31.68×2.72+290.68×5.44+170.94×7.96)
    (96.96-5.13×10)×3.215+2×4.7×√3.215
    (96.96-5.13×10)×3.215+2×4.7×√3.215
    (64.83-3.43×10)×3.215+2×4.7×√3.215
    (275.74-10.7×10)×0.311-2×4.7×√0.311+(10.7-5.13)×10
    =(243.61-9×10)×0.311-2×4.7×√0.311+(9-3.43)×10
    175.57×0.556-2×24×√0.556

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