(6y+2)(6y-2)

To simplify the expression \((6y + 2)(6y - 2)\), you can use the difference of squares formula, which states that \((a + b)(a - b) = a^2 - b^2\).

In this case, let \(a = 6y\) and \(b = 2\). Thus, we have:

\[ (6y + 2)(6y - 2) = (6y)^2 - (2)^2 \]

Now, calculate each square:

\[ (6y)^2 = 36y^2 \] \[ (2)^2 = 4 \]

Putting it together:

\[ (6y + 2)(6y - 2) = 36y^2 - 4 \]

So, the simplified expression is:

\[ 36y^2 - 4 \]