X+(x+10)+2(x+10)

The expression you've provided is a polynomial expression that can be simplified by combining like terms. Let's simplify it step by step:

x + (x + 10) + 2(x + 10)

First, distribute any values outside parentheses and remove the parentheses:

x + x + 10 + 2x + 2 * 10

Now combine like terms (x's together and constants together):

x + x + 2x + 10 + 20

Now add the coefficients of x and the constants:

(1x + 1x + 2x) + (10 + 20)

4x + 30

So, the simplified form of the given expression is:

4x + 30