(1又3/4+7/8-7/12)×(-1又1/7)

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(1又3/4+7/8-7/12)×(-1又1/7)
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(1又3/4+7/8-7/12)×(-1又1/7)
(1又3/4+7/8-7/12)×(-1又1/7)

(1又3/4+7/8-7/12)×(-1又1/7)