Simplify the following: explain each answer (step by step please and number the problem dat u slove out thanks )

1.3x2 + 4x + 5x2 - 5y

2.(4x - 2y) - (2x + 5y)

3.3x3(4x2)
4.5x^3y^4z
---------
10xy^2z^3
5.5.(-8a3b4)2

6.(x + 6)(x - 6)

7.(2x - 7)2

8.(2x + 5)(3x - 7)
9.5y^3y+xy^4+2xy
---------------
xy
10. 16ab+4ab^4+24b
---------------
4b

Question

Simplify the following: explain each answer (step by step please and number the problem dat u slove out thanks )

1.3x2 + 4x + 5x2 - 5y

2.(4x - 2y) - (2x + 5y)

3.3x3(4x2)
4.5x^3y^4z
   ---------
  10xy^2z^3
5.5.(-8a3b4)2

6.(x + 6)(x - 6)

7.(2x - 7)2

8.(2x + 5)(3x - 7)
9.5y^3y+xy^4+2xy
   ---------------
               xy
10. 16ab+4ab^4+24b
       ---------------
           4b

anonymous · Answer

Let's start here:
3x2 + 4x + 5x2 - 5y 

What should we do first?

anonymous · Answer

add

anonymous · Answer

Good.  But which ones can we add?

anonymous · Answer

3x^2.
.