Răspuns:
{2,2:[0,2+0,0(2):0,(02)]-(0,(6))²}:1,(5)=
=[2,2:(2/10+2/90:2/99)-(6/9)²]:(15-1)/9=
[22/10:(2/10+2/90·99/2)-6²/9²]:14/9=
2/90·99/2 se reduc termenii pe diagonala
[22/10:(2/10+11/10)-(36/81)⁽⁹]·9/14=
(22/10:13/10-4/9)·9/14=
(22/10·10/13-4/9)·9/14=
22/10·10/13 se reduc termenii pe diagonala
(⁹⁾22/13-¹³⁾4/9)·9/14=
(198/117-52/117)·9/14=
146/117·9/14=
146/182=0,802
