Answer
-4
Work Step by Step
We know if $f$ is a polynomial function and $a$ is any real number, then $\lim\limits_{x \to a}f(x)=f(a)$.
Hence since $x^2-13$ is a polynomial, we have $\lim\limits_{x \to -3}(x^2-13)=(-3)^2-13=9-13=-4.$
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