Răspuns :
55:2-77x66-7+900x34-(90+566)=
55:2-77x66-7+900x34-656=
27,5-5082-7+30600-656=
-5054,5-7+30600-656=
-5061,5+30600-656=
25538,5-656=24882.5
55:2-77x66-7+900x34-656=
27,5-5082-7+30600-656=
-5054,5-7+30600-656=
-5061,5+30600-656=
25538,5-656=24882.5