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The expression you provided is a summation notation, given by:

\[
\sum_{i=3}^{n} (x_i + 10)^2
\]

This means you are summing the squared values of \((x_i + 10)\) from \(i = 3\) to \(i = n\), where \(x_i\) represents the elements of some sequence or function.

The sum is expanded as follows:

\[
(x_3 + 10)^2 + (x_4 + 10)^2 + \dots + (x_n + 10)^2
\]

To calculate the result, you would need to know the values of \(x_i\) for each index \(i\) from 3 to \(n\), as well as the upper limit \(n\).

Would you like to clarify the values of \(x_i\) and \(n\), or should I assist further in another way?

Here are some related questions to expand upon this:

1. What is the value of \(n\) in your problem?
2. Do you know the specific values for each \(x_i\)?
3. Should the summation be simplified symbolically without specific values of \(x_i\)?
4. Would you like to generalize this formula for a sequence of \(x_i\)?
5. Are you working with specific conditions or constraints for \(x_i\)?

**Tip:** Summation notation is useful to represent large sums concisely, especially when dealing with sequences or patterns in data.

What is the sum of the expression Σ (x_i + 10)^2 from i=3 to n?

This page covers the summation Σ (x_i + 10)^2 starting from i=3 up to n, demonstrating how to work with summation notation and quadratic expressions. Detailed steps for expanding the sum and calculating results with given values for x_i and n are included.

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