Let $r$ be a root of $x^2 + 5x + 7 = 0.$  Compute
\[(r - 1)(r + 2)(r + 6)(r + 3).\]
Question:
Let $r$ be a root of $x^2 + 5x + 7 = 0.$  Compute
\[(r - 1)(r + 2)(r + 6)(r + 3).\]
Answer:
Let's think step by step.

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13
Let $r$ be a root of $x^2 + 5x + 7 = 0.$  Compute
\[(r - 1)(r + 2)(r + 6)(r + 3).\]
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