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What is the expression in radical form?

[tex](3p^3q)^\frac{3}{4}=\sqrt[4]{(3p^3q)^3}=\sqrt[4]{3^3(p^3)^3q^3}=\sqrt[4]{27p^9q^3}\\\\\text{Used:}\\\\a^\frac{m}{n}=\sqrt[n]{a^m}\\\\(a\cdot b)^n=a^nb^n\\\\(a^n)^m=a^{nm}[/tex]