To simplify the given expression, we need to combine like terms. Notice that the terms \(x^6\) and \(-7\) in the first polynomial and \(x^6\) and \(7\) in the second polynomial can be combined.
Solution Approach
Combine the \(x^6\) terms from both polynomials.
Combine the constant terms \(-7\) and \(7\).
Step 1: Combine Like Terms
We start with the expression:
\[
\left(x^{6}-7\right)+\left(x^{6}+7\right)
\]
We can combine the \(x^6\) terms:
\[
x^6 + x^6 = 2x^6
\]
Step 2: Combine Constant Terms
Next, we combine the constant terms:
\[
-7 + 7 = 0
\]
Step 3: Write the Simplified Expression
Putting it all together, we have:
\[
2x^6 + 0
\]
This simplifies to:
\[
2x^6
\]