Expand `(x^2+2a)^5` by binomial theorem.

Explanation

To expand the expression \((x^2 + 2a)^5\) using the Binomial Theorem, we follow these steps:

### Step 1: Identify the terms and the exponent
In the expression \((x^2 + 2a)^5\), we identify:
- \(x^2\) as the first term (\(x\))
- \(2a\) as the second term (\(y\))
- The exponent \(n = 5\)

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