(-9 4/21 + 4 11/14) - (-2,74 - 1,26)

(-9 4/21 + 4 11/14) - (-2,74 - 1,26) = -9 4/21 + 4 11/14 + 2,74 + 1,26 = -9 4/21 + 4 11/14 + 4 = -9 4/21 + 4 11/14 + 4 = -10 59/42 + 4 11/14 = -11 17/42 + 4 11/14 = -11 17/42 + 4 22/42 = -11 + 4 + 5 5/42 = -7 5/21