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

(-9 4/21 + 4 11/14) - (-2,74 - 1,26) = -221/21 + 53/14 - (-4) = -221/21 + 53/14 + 4 = -56/3 + 53/14 + 4 = -190/14 + 53/14 + 56/14 = 19/14