(51又7/12+34.5/6/7)*5/14
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![(51又7/12+34.5/6/7)*5/14](/uploads/image/z/14675639-23-9.jpg?t=%2851%E5%8F%887%2F12%2B34.5%2F6%2F7%29%2A5%2F14)
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(51又7/12+34.5/6/7)*5/14
(51又7/12+34.5/6/7)*5/14
(51又7/12+34.5/6/7)*5/14
(51又7/12+34.5/6/7)*5/14
=(51又7/12+34.5*7/6)*5/14
=(51又7/12+30又1/4)*5/14
=81又5/6*5/14
=491/6*5/14
=2455/84
=29又19/84
11005/588