Input: lim(sum(1/k!,k,0,x),x,oo)
Write: `lim(sum(1/k!,k,0,x),x,oo)`
Output: $$ \lim _{x->oo} \sum _{k=0} ^ {x} \frac {1}{(k)!} == 2.718281828459045 $$ Result:$$2.718281828459045$$