I don't know exactly what you mean by typing like this 2y3(4x-3y). I assume that means 2y cubed (2y^3) or 2y3 times (4x-2y)

That becomes 8xy3 -6y4

Expand all the parenthesis, then gather like terms, and add them.

See
http://www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/beg_alg_tut11_simp.htm

I have a wksh and I have three question left and I cant fugure them out. PLEASE HELP! What you have to do is simplify expressions by combining like terms. There are three in each question and have to figure out what two are more a like.

2. 12x-3y+x+2y 3(4x-3y)+3y 4(4-2y)-3x+7y

5. 3(r-1)-4r+5 2(3-2r)-4(2-r -r+7+3r-9-2r

7. 3(2b-a)-(2a-b (a=2b)-(b+2a) (A+2B)-(a-b)

Please help. You guys might think you are giving me the answers. If you want you can tell me how to do the problems and I will figure it out. THANK YOU SO MUCH IF YOU HELP ME!!!!!!!!!!!!!!!!!!!

To simplify the expressions, you need to combine like terms by adding or subtracting them.

Let's go through each question step by step:

2. 12x-3y+x+2y
First, combine the x terms: 12x + x = 13x
Next, combine the y terms: -3y + 2y = -y
So the simplified expression is 13x - y

3(4x-3y)+3y
First, distribute the 3 to each term inside the parentheses: 3 * 4x = 12x and 3 * -3y = -9y
Next, combine the x terms: 12x
Then, combine the y terms: -9y + 3y = -6y
So the simplified expression is 12x - 6y

4(4-2y)-3x+7y
First, simplify within the parentheses: 4 - 2y = 4 - 2y
Next, distribute the 4 to each term inside the parentheses: 4 * 4 = 16 and 4 * -2y = -8y
Then, combine the constant terms: 16
Next, combine the x terms: -3x
Finally, combine the y terms: -8y + 7y = -y
So the simplified expression is 16 - 3x - y

5. 3(r-1)-4r+5
First, distribute the 3 to each term inside the parentheses: 3r - 3
Next, combine the r terms: 3r - 4r = -r
Then, combine the constant terms: -3 + 5 = 2
So the simplified expression is -r + 2

2(3-2r)-4(2-r -r+7+3r-9-2r)
First, simplify within the parentheses: 3 - 2r = 3 - 2r, 2 - r = 2 - r, r + 7 = r + 7, and 3r - 9 = 3r - 9
Next, distribute the 2 to each term inside the parentheses: 2 * 3 = 6 and 2 * -2r = -4r
Then, distribute the -4 to each term inside the parentheses: -4 * 2 = -8, -4 * -r = 4r, -4 * r = -4r, -4 * 7 = -28, -4 * 3r = -12r, and -4 * -2r = 8r
Next, combine the constant terms: 6 - 8 - 28 = -30
Next, combine the r terms: -4r + 4r - 12r + 8r = -4r - 12r + 8r = -8r
Finally, gather all like terms: -30 - 8r - 2r - r + 6r = -6r - r - 30
So the simplified expression is -6r - r - 30

3(2b-a)-(2a-b)
First, distribute the 3 to each term inside the parentheses: 3 * 2b = 6b and 3 * -a = -3a
Next, distribute the -1 to each term inside the parentheses: -1 * 2a = -2a and -1 * -b = b
Next, combine the b terms: 6b - b = 5b
Then, combine the a terms: -3a - 2a = -5a
So the simplified expression is 5b - 5a

(a=2b)-(b+2a)
First, substitute the value of a into the expression: (2b) - (b + 2(2b)) = 2b - (b + 4b)
Next, simplify within the parentheses: b + 4b = 5b
Finally, subtract: 2b - 5b = -3b
So the simplified expression is -3b

Remember, the key to simplifying expressions is to combine like terms by adding or subtracting them. Keep practicing and you will improve your skills!