Đáp án:
Giải thích các bước giải:
`13/37.` `5/12` `-` `7/37.` `13/6+` `-1/37.` `13/4`
`=` `1/37` `.` `13` `5/12` `-` `1/37` `.91/6` `-` `1/37.` `13/4`
`=` `1/37` `.` `65/12` `-` 1/37` `.91/6` `-` `1/37.` `13/4`
`=` `1/37` `.(65/12-91/6-13/4)`
`=` `1/37` `.` `(65/12-182/12-39/12)`
`=` `1/37` `.` `156/12`
`=` `1/37` `.` `78/6`
`=` `78/222`
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