(4ц2\11-1ц6\11)+7ц4\11-(9\11+3ц7\11)
1)4 2/11-1 6/11=3 13/11-1 6/11=2 7/11 2)9/11+3 7/11=3 16/11=4 5/11 3)2 7/11+7 4/11=9 11/11=10 4)10-4 5/11=9 11/11-4 5/11=5 6/11-ответ