By distributing the negative sign to the terms inside the second parentheses, we have:
2a^2 + 5a + 7 - a^2 + 3a + 1
Combining like terms, we get:
(2a^2 - a^2) + (5a + 3a) + (7 + 1)
Simplifying further,
a^2 + 8a + 8
Therefore, the answer is a^2 + 8a + 8.
2a^2 + 5a +7) - (a^2 - 3a - 1) = ?
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