Answer:
5x³y² - 2x²y³ - 7y²
Explanation:
Step 1: Write expression
(3x³y² + 5x²y³ - 6y²) - (7x²y³ - 2x³y² + y²)
Step 2: Distribute negative
3x³y² + 5x²y³ - 6y² - 7x²y³ + 2x³y² - y²
Step 3: Combine like terms (x³y²)
5x³y² + 5x²y³ - 6y² - 7x²y³ - y²
Step 4: Combine like terms (x²y³)
5x³y² - 2x²y³ - 6y² - y²
Step 5: Combine like terms (y²)
5x³y² - 2x²y³ - 7y²