11 and 12 1 minus 3 and 7 1 minus 2 and 7 6

11 and 12 1 minus 3 and 7 1 minus 2 and 7 6

11 and 12 1 minus 3 and 7 1 minus 2 and 7 6
=11 1 / 12 minus (3 1 / 7 + 2 6 / 7)
=1-6 of 11 and 12
=5 and 1 / 12