Raspuns:190/9
Explicație pas cu pas:
2,(3)+[(1,5+4/9x2,1/4):1/9+11/4]x4=
2,3/9+[1,5+4/9X(2*4+1):9+11/4]x4=
(2x9+3)/9+[1,5+4/9x9:9+11/4]x4
21/9+(1,5+4:9+11/4)x4=
21/9+(6+16/9+11)=
21/9+17+16/9=17+37/9=
153/9+37/9=190/9
