Respuesta :

Answer:

There you go mate!

Step-by-step explanation:

Tell me if it's unclear!

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Answer:

4a^2+7a+4

Step-by-step explanation:

Step 1:  make an equation

(7a - a^2)-(-4+3a^2)

Step 2: solve it

(7a - a^2)-(-4+3a^2)

4a^2+7a+4