Adding and Subtracting Polynomials

Combine like terms to simplify:
 (5x + 2) + (4x + 5)

Combine like terms: 6x + 3 - 2x + 5

Add the polynomials: (2x + 5y) + (3x - 2y)

Which of the following are examples of like terms? Options: 2 and 2x, y³ and x³, y and x, -3x and 3x

What is the correct name of the following:
3x + 5y² - 3
Options: monomial, binomial, trinomial, polynomial

Simplify the expression: (4a³ - 8a - 4a²) + (7a³ - 7 - 6a)

Simplify the expression: (6x + 4x⁴ - 3x²) + (7x⁴ + 5x² + 8x)

What is the standard form of the polynomial:
 9x² + 5x + 27 + 2x³

Add the polynomials: (2x + 5y) + (3x - 2y)

Find the sum.
(3y² + y³ - 5) + (4y² -4y + 2y³ + 8)