Odpowiedź :
956/186 + 1038/186 = 1994/186
1994/186 - -82/186 = 1994/186 + 82/186 = 2076/186
1994/186 - -82/186 = 1994/186 + 82/186 = 2076/186
91/6+173/16-(91/6-173/16) = (728+519)/48-(728-519)/48 = (1247-211)/48 = 1036/48 = 259/12 = 21 i 7/12