7. Let $r_1, r_2, r_3$ be the roots of the polynomial equation $x^3 - 2x^2 + 4x + 10 = 0$. Compute the value of $(r_1 + 2)(r_2 + 2)(r_3 + 2)$.

Let's think step by step and output the final answer within \boxed{}.
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