\[\boxed{\text{140.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[120\ :4 + 2 \cdot 3 = 30 + 6 = 36.\]
\[120\ :(4 + 2) \cdot 3 = 120\ :6 \cdot 3 =\]
\[= 20 \cdot 3 = 60.\]
\[(120\ :4 + 2) \cdot 3 =\]
\[= (30 + 2) \cdot 3 = 32 \cdot 3 = 96.\]
\[120\ :(4 + 2 \cdot 3) =\]
\[= 120\ :(4 + 6) = 120\ :10 =\]
\[= 12.\ \]