Question 161750
{{{(15a to the power of 4) (a to the power of 5a) over (3a to the power of 11)}}} 
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Did you mean {{{15a^4*a^5/3a^11}}} ?
If so,
{{{15a^4*a^5/3a^11}}}
={{{15a^9/3a^11}}}  Add the exponents in the NUM
={{{5a^9/a^11}}}    Divide by 3
={{{5/a^2}}}        Divide by a^9