Question 1199464
<pre>
Instead of doing yours for you, I'll do one exactly step by step
like yours.

{{{(-20mn^6)*(-expr(1/5)m^2n^4)}}}

Make sure that every letter has an exponent. The m in the parentheses
on the left is not showing an exponent, so we give it the exponent 1.

{{{(-20m^1n^6)*(-expr(1/5)m^2n^4)}}}

-20 times {{{-1/5}}} is {{{(-20)*(-1/5)=""+4}}} or just {{{4}}}

{{{m^1}}} in the parentheses on the left times {{{m^2}}} in the parentheses on the right
is {{{m^(1+2)}}} or {{{m^3}}}, for we MULTIPLY by ADDING exponents.

{{{n^6}}} in the parentheses on the left times {{{n^4}}} in the parentheses on the right
is {{{n^(6+4)}}} or {{{n^10}}}, for we MULTIPLY by ADDING exponents.

So the answer is {{{4m^3*n^10}}}

Edwin</pre>