3y+6y^3-2y^2+5y^3+5y^2-4y+2

What about it?

Other than

3y+6y^3-2y^2+5y^3+5y^2-4y+2
= 11y^3 + 3y^2 - y + 2

there is not much to be done with it.

To simplify the expression 3y + 6y^3 - 2y^2 + 5y^3 + 5y^2 - 4y + 2, we can combine like terms by adding or subtracting them.

First, let's rearrange the terms in descending order of their exponents:
6y^3 + 5y^3 - 2y^2 + 5y^2 + 3y - 4y + 2

Now we can combine the like terms:

The terms with y^3: 6y^3 + 5y^3 = 11y^3

The terms with y^2: -2y^2 + 5y^2 = 3y^2

The terms with y: 3y - 4y = -1y or simply -y

The constant term: 2 remains the same.

Therefore, the simplified expression is 11y^3 + 3y^2 - y + 2.