(y²) ³

To simplify \((y^2)^3\), you can use the power of a power property of exponents, which states that \((a^m)^n = a^{m \cdot n}\).

Applying this rule:

\[ (y^2)^3 = y^{2 \cdot 3} = y^6 \]

So, \((y^2)^3 = y^6\).