3(a²+2a)-[(5a-4a²)-3a]

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3(a²+2a)-[(5a-4a²)-3a]

3(a²+2a)-[(5a-4a²)-3a]
3(a²+2a)-[(5a-4a²)-3a]

 


3(a²+2a)-[(5a-4a²)-3a]