(25-8 3/4)+(13 5/12-2 11/18)-(2 2/9-1 3/4)=

25-35/4+161/12-47/18-20/9+7/4=(25-35/4+161/12+7/4)-(47/18+20/9)=(300/12-75/12+161/12+21/12)-(47/18+40/18)=407/12-87/18=1221/36-174/36=1047/36
=29 3/36=29 1/12