Suggested Answer
[tex]\left( \cfrac{2a}{p^2}\cdot q^3 \right)^2\implies \left( \cfrac{2^2a^2}{p^{2\cdot 2}}\cdot q^{3\cdot 2} \right)\implies \cfrac{4a^2q^6}{p^4}[/tex]
[tex]\left( \cfrac{2a}{p^2}\cdot q^3 \right)^2\implies \left( \cfrac{2^2a^2}{p^{2\cdot 2}}\cdot q^{3\cdot 2} \right)\implies \cfrac{4a^2q^6}{p^4}[/tex]