Răspuns:
[1,25•2,(6)-4]⁷:[0,(6)]⁵-1,2(7)=
(125/100×(26-2)/9-4)⁷:(6/9)⁵-(127-12)/90=
(5/4×24/9-4)⁷:(2/3)⁵-(115/90)⁽⁵=
(10/3-³⁾4)⁷:(2/3)⁵-23/18=
(10/3-12/3)⁷:(2/3)⁵-23/18=
-(2/3)⁷:(2/3)⁵-23/18=
-(2/3)²-23/18=
(-4/9)⁽²-23/18=
-8/18-23/18=
-31/18=-1,7(2)