Question 1059748
1/4+2/5+1/2+...+11/14
<pre>
If you consider the {{{1/2}}} as {{{3/6}}}, then it goes

{{{1/4+2/5+3/6+4/7+5/8+6/9+7/10+8/11+9/12+10/13+11/14}}}

where the numerators go 1,2,3,4,...,11 which is n going 
from 1 to 11.  Then the denominators go 4,5,6,7,...,14
and each denominator is always 3 more than the numerator.
So the denominators are the numerators, n, plus 3, so the 
summation is

{{{sum((n/(n+3)),matrix(1,2,"",n=1),matrix(1,3,"","",11))}}}

Edwin</pre>