Răspuns :
{[(1+38:2)+[(6-4):2]x10}:2=14
[(1+19)+(2:2)]x10]:2=14
(20+1x10):2=14
(20+10):2=14
30:2=15
[(1+19)+(2:2)]x10]:2=14
(20+1x10):2=14
(20+10):2=14
30:2=15
{[1+38:2]+[(6-4):2]×10}:2=
[(1+19)+(2:2)×10]:2=
(20+1×10):2=
(20+10):2=
30:2=15