Question: how to add and subtract polynomials examples?
Answer: Example: Add the polynomials 5x – 2 + y and –3y + 5x + 2.
Solution: 5x – 2 + y + (–3y + 5x + 2) ... 
Example: Find the sum of –7x3y + 4x2y2 – 2 and 4x3y + 1 – 8x2y2
Solution: –7x3y + 4x2y2– 2 + 4x3y + 1 – 8x2y2 ... 
Example: Simplify –4x + 7 – (5x – 3) ... 
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