We evaluate a function at a particular value. If the function \( f(x) = x^3 + x + 1 \) is evaluated at \( x = -2 \), we denote this as \( f(-2 \).
In this case, that would require replacing every instance of \( x \) in the function's definition with the value to be evaluated, like this:
\[ f(-2) = (-2)^3 + (-2) + 1 = -8 -2 +1 = -9. \]