You can put this solution on YOUR website! I have no idea what you're doing. Let's start from the beginning. First, you should make your notation clear by correctly placing parentheses, and don't place operations such as * or + unless you clearly know what number/expression you want to use. Knowing LaTeX or the notation on algebra.com can help (here I use LaTeX since it is more widely used, and is neater).
You want to do the operation
.
First, do the innermost operations (in this case, multiplying variable expressions by constants) to get
Then add. You cannot combine x^2 and x terms together, similar to the fact that you cannot combine apples and oranges and obtain apples. Adding, we get
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For the multiplication one, we multiply the -2/3 with the 1/3, so our expression is equivalent to
Then multiply. Be careful about the negative signs.
