Respuesta :

-4a, -6b + 13 would be the answer
The answer would be: -4a -6b +13
The breakdown:
Numbers in expression; 3a,-7a,-6b,10,3.

3a-7a = -4a
-6b = -6b
10+3 = 13
+++
=
- 4a - 6b + 13

Hope that helps you!