(2,5 - 2 1/3) * (-5 1/7) + 1 1/3 : (-5,6) = -1 43/84
1) 2 1/2 -2 1/3 = 5/2 -7/3 = 15/6 -14/6 = 1/6
2) 1/6 * (- 5 1/7) = 1/6 * (- 36/7) = -6/7
3) 11/3 : (-5 3/5) = 11/3 : (-28/5) =11/3 * (- 5/28) = - 55/84
4) - 6/7 + (-55/84) = -72/84 - 55/84 = - 127/84 = -1 43/84