51又2/3×0.6-71075×4/7+91.8×5/9

51又2/3×0.6-71075×4/7+91.8×5/9
51又2/3×0.6-71075×4/7+91.8×5/9

51又2/3×0.6-71075×4/7+91.8×5/9
51又2/3×0.6-71075×4/7+91.8×5/9
=155/3×3/5-284300/7+10.2×5
=51-40614又2/7+51
=-40502又2/7
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