Question 490863
{{{4x^-2(3ax)^5}}}

{{{4*(3ax)^5/x^2}}}

{{{243a^5x^5/x^2}}}

{{{972a^5x^3}}}


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{{{(3x)^3 / x^2*x^4}}}

{{{27x^3/x^6}}}

{{{27/x^3}}}

I think you are right