(2*5/6)²-(3²-√1 i 7/9)

(2 *5/6)^2 -[3^2 - V(1 i 7/9)] = =(10/6)^2 -(9 - V16/9) = =(5/3)^2 -(27/3 -4/3) = = 25/9 -23/3= = 25/9 - 69/9 = = -44/9 = -4 8/9