nawias siedem trzecich minus piec dwunastych plus 1 i jedna druga nawias podzielic nawias 2 i trzy czwarte minus piec szostych nawias
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(7/3 - 5/12 + 1 1/2) : (2 3/2 - 5/6) =
= (7/3 - 5/12 + 3/2) : (11/4 - 5/6) =
= (28/12 - 5/12 + 18/12) : (33/12 - 10/12) =
= 41/12 : 23/12 = 41/12 * 12/23 =
= 41/23 = 1 18/23