Answer:
[tex]54x^3y^7[/tex]
Step-by-step explanation:
[tex]\frac{4\left(3x^2y^4\right)^3}{2x^3y^5}[/tex]
[tex]\frac{3^3\cdot \:2x^6y^{12}}{x^3y^5}[/tex]
[tex]\frac{2\left(3x^2y^4\right)^3}{x^3y^5}[/tex]
[tex]3^3\cdot \:2x^3y^7[/tex]
[tex]=54x^3y^7[/tex]
