ans this questions
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you should put each questions in different ones you cant do this to me
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i.-11/5+4/7=-77+20/35=-57/35
4/7+[-11/5]=20-77/35=-57/35
ii.4/9-7/12=16-21/36=-5/36
-7/12+4/9=-21+16/36=-5/36
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