$3^2 \cdot \sqrt[4]{3}$3^2 \cdot \sqrt[4]{3}

$\sqrt[4]{3^3}$\sqrt[4]{3^3}

$3^2+\sqrt[4]{3}$3^2+\sqrt[4]{3}

$3^2+\sqrt{3^4}$3^2+\sqrt{3^4}