7\3-31\3-41\5-17\5=?
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7\3-31\3-41\5-17\5=?7\3-31\3-41\5-17\5=?7\3-31\3-41\5-17\5=?答案为-294/157\3-31\3-41\5-17\5=(7\3-31\3)-
7\3-31\3-41\5-17\5=?
7\3-31\3-41\5-17\5=?
7\3-31\3-41\5-17\5=?
答案为-294/15
7\3-31\3-41\5-17\5
=(7\3-31\3)-(41\5+17\5)
=-24\3-58\5
=-8-58\5
=-98\5