Respuesta :

Answer:

ab+13b-3a+3ab^2+76

Step-by-step explanation:

(ab?+13b-4a)+(3ab^2+a+76)

ab+13b-4a+3ab^2+a+76

collect like term

.           -4a               a

.

.

ab+13b-3a+3ab^2+76