(-2 1/6 - 3 1/4) : 2 3/5+2/3*2 1/4-5 1/6 помгите !

1) - 13/6 - 13/4 = - 26/12 -39/12 = -65/12
2) -65/12 : 13/5 = - 169/12
3) 2/3 х 9/4 = 3/2
4) -169/12 + 3/2 = -169/12 + 18/12 = - 151/12
5) - 151/12 - 31/6 = - 151/12 - 62/12 = - 213/12 = -17ц.9/12= -17ц.3/4