2 + ( -6 1/3) + ( -3 1/6)

To simplify the expression, first convert the mixed numbers into improper fractions:

-6 1/3 = -19/3
-3 1/6 = -19/6

Now the expression becomes:

2 + (-19/3) + (-19/6)

To add the fractions, we need a common denominator. The least common multiple of 3 and 6 is 6. So, we can rewrite the expression as:

2 + (-38/6) + (-19/6)

Now we can add the fractions:

2 + (-57/6)

-57/6 can be further simplified by dividing both the numerator and denominator by 3:

2 + (-19/2)

Now, we can add the whole numbers and fractions:

2 + (-19/2) = 2 - 19/2 = 4/2 - 19/2 = -15/2

Therefore, the simplified expression is -15/2.