To solve this expression, we first need to combine like terms.

-6ц2\3а + 4ц3\4а can be combined as -6ц2\3а + 4ц3\4а = -2ца

Now the expression becomes:

-2ца - 1\6 - 1\12

To combine -1\6 and -1\12, we need to find a common denominator, which is 12.

-1\6 = -2\12
-1\12 = -1\12

Now the expression becomes:

-2ца - 2\12 - 1\12 = -2ца - 3\12

Therefore, the simplified expression is -2ца - 3\12.