11целых13/15-(9целых-13/15-1целую14/15=144/15-(9/1-13/15-28/15)=144/15-(-32/15)=176/15=11целых11/15
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11целых13/15-(9целых-13/15-1целую14/15=144/15-(9/1-13/15-28/15)=144/15-(-32/15)=176/15=11целых11/15