157/15-(3-1 5/9)*7/15+5/9
157/15-13/9*15/7+5/9
157/15-13/3*5/7+5/9
157/15-65/21+5/9
2497/315
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157/15-(3-1 5/9)*7/15+5/9
157/15-13/9*15/7+5/9
157/15-13/3*5/7+5/9
157/15-65/21+5/9
2497/315