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a fost răspuns

1 (1/2-2/3)³:(5/6)²-(1   2/3-4/5)²: (2     3/5 )²

Răspuns :

=[(3-4)/3]³:25/36-(5/3-4/5)²:(13/5)²=
=(-1/3)³·36/25-[(25-12)/15]²:(169/25)=
=-1/27·36/25-(13/15)²·25/169=simplif=
=--1/3·4/25-169/225·25/169=simplif=
=-4/125-1/9·1/1=
=-4/125-1/9=(-36-1)/1125=-37/1125=-0,032(8)

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