The given expression is:
[tex]\frac{15a^4b^3}{12a^2b}[/tex]The expression can also be re-written as:
[tex]\frac{15\times a\times a\times a\times a\times b\times b\times b}{12\times a\times a\times b}[/tex]The expression reduces to:
[tex]undefined[/tex]