Factorise `8x^3+27 y^3+36 x^2y+54 x y^2`.

Explanation

To factorize the expression \( 8x^3 + 27y^3 + 36x^2y + 54xy^2 \), we can follow these steps:

### Step 1: Identify the terms
The expression is:
\[ 8x^3 + 27y^3 + 36x^2y + 54xy^2 \]
We can see that it consists of two cubes: \( 8x^3 \) and \( 27y^3 \), along with additional terms.
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