Like unlike terms and simplifying

Identify the "like terms" in the expression: 
2x + 4y - 3x + y - x

• 2x and 4y and -3x
• 2x and -3x and x
  4y and y 
• they are all like terms
• there are no like terms

Identify the like terms: 7y + 5r -4r + 2w +r

• 7y and 2w

• 5r ,-4r, and r

• 5r abd r

• none

True or False:
u³and u² are like terms.

• True 
• False

What are the like terms in the following expression?
4x² - 3x - 2x

• -3x, -2x
• 3x, 2x
• -3x, 2x
• 3x, -2x

Are these like terms?

4x² and 13x²

• Yes

• No

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Simplify the expression: 7v + 2 + 12 + 2v

• 23
• 23v
• 9 + 14v
• 9v + 14

-8d+8d

Simplify by combining like terms:
4x² - 3x + 11 -2x

• 4x² - 5x + 11
• 11x + 11
• 16x² - 5x + 11
• 10x²

Simplify the expression:

3x² - x + 7 + 5x + 2 - 2x²

• x² + 4x + 9

• 5x² + 9

• 15

• 15x