Add ; `7x^2-4x+5,\ -3x^2+2x-1\ a n d\ 5x^2-x+9.`

Explanation

To add the algebraic expressions \(7x^2 - 4x + 5\), \(-3x^2 + 2x - 1\), and \(5x^2 - x + 9\), we will follow these steps:

### Step 1: Identify Like Terms
We need to group the like terms together. Like terms are terms that have the same variable raised to the same power.

- The terms with \(x^2\) are:
- \(7x^2\)
- \(-3x^2\)
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