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Answer:
2/2+1/5=3/7+2/4=5/11
4/10=6/15. 5/10=8/17. 3/5=8/16
6/15+3/5=9/20. 5/11+5/10=10/21. 5/11+3/5=8/21
9/20+3/5=12/25+6/10=18/35