Răspuns Exercitiul este { [:(1/2 + 7/2 ) : 2 + 1/3 ] ^2}: (1 - 2/9) =
= { [:(8/2 ) : 2 + 1/3 ] ^2}: (9/9 - 2/9) =
= { [:4 : 2 + 1/3 ] ^2}: (7/9) =
= { [:2+ 1/3 ] ^2}: (7/9) =
= { [:6/3+ 1/3 ] ^2}: (7/9) =
= { [:7/3 ] ^2} * (9/7) =
49/9*9/7 =
49/7 = 7