Answer:
-88
Step-by-step explanation:
If a=2, we can say that -[tex]a^{2}[/tex] would be -4.
Secondly, if a=2 and b=-6 we can assume that 4ab would become -48.
Finally, if b=-6 we can say that -[tex]b^{2}[/tex] would become -36.
Adding all of those up gives you -88, your answer.