Final answer:
The question is about adding and subtracting polynomials; combine like terms to get the result, such as 2x³ + 19x² - 5x - 12.
Step-by-step explanation:
The student's question involves adding and subtracting polynomials, which is a concept in algebra within mathematics. When combining polynomials, we combine like terms, meaning terms with the same variables raised to the same power. For example, if we have 2x³ + 17x² - x + 2x² - 4x - 12, we would combine the x³ terms, x² terms, x terms, and constant terms separately to get the result. In this case, it would simplify to 2x³ + (17x² + 2x²) + (-x - 4x) - 12, which further simplifies to 2x³ + 19x² - 5x - 12.