Р) (5/7 - 3/12 - 17/36) · (2 1/2 + 4 1/3 - 3/26 + 1/2)

(5/7 - 3/12 - 17/36) · (2 1/2 + 4 1/3 - 3/26 + 1/2) = (180/252 - 63/252 - 119/252) · (15/6 + 13/3 - 3/26 + 13/26) = result not simplified due to long computation