(-2 1/8)*(-1 29/51)+(-1 23/42)*3 1/13-(-4 2/3)*6= 26 4/7
1) (-2 1/8)*(-1 29/51)= -17/8*(-80/51)= 10/3= 3 1/3
2) -1 23/42*3 1/13= -65/42*40/13= -100/21= -4 16/21
3)-4 2/3*6= -14/3*6= -28
4) 10/3+(-100/21)= 70/21-100/21= -30/21= -10/7= -1 3/7
5) -10/7-(-28)= -10/7+196/7= 186/7= 26 4/7