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[latex]3a^2-4+5a^2+6a-(a^2-7a+11)=\\ 8a^2+6a-4-a^2+7a-11=\\ 7a^2+13a-15[/latex]

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(1) Answers

[latex]3a^2-4+5a^2+6a-(a^2-7a+11)=\\ 8a^2+6a-4-a^2+7a-11=\\ 7a^2+13a-15[/latex]

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