adding/subtracting polynomials

Combine like terms: 3w - 8k + 12w + w - 5k

• 15w - 13k

• 16w - 13k

• 16w + 3k

• 15w + 3k

Combine like terms:

-m + 17m - 12c + 3m + 4c + 21c

• 19m + 13c

• 21m + 37c

• 20m + 12c

• 19m - 12c

(2x + 5y - z) + (-6x - 4y + 7z)

• -4x +6y + 6z
• 4x + y + 6z
• -4x - y + 6z
• -4x + y + 6z

(5x - y) + (2x + 6y)

• 7x + 7y
• 7x + 5y
• 7x + 6y
• 3x - 5y

Simplify:

(4n⁴ - 8n + 4) - (8n² + 4n⁴ + 1)

• -8n² - 8n + 3

• -7n² - 8n + 3

• -6n² - 8n + 3

• -7n² - 4n + 3