Write as a single fraction. \[ -2+\frac{3 a-2 b}{6 a}+\frac{7 a-7 b}{2 a} \] Simplify your answer as much as possible.

Step 1 ：Given the expression: \(-2+\frac{3 a-2 b}{6 a}+\frac{7 a-7 b}{2 a}\)

Step 2 ：We need to simplify this expression into a single fraction. To do this, we need to find a common denominator for the fractions and then combine them. The common denominator in this case would be 6a.

Step 3 ：We also need to convert the integer -2 into a fraction with the same denominator.

Step 4 ：By doing these steps, we get the simplified expression: \(2 - \frac{23b}{6a}\)

Step 5 ：Final Answer: The simplified expression is \(\boxed{2 - \frac{23b}{6a}}\)