Question 1126515
Series appears to be like 2+12+22+32+... ADDED TO 7+17+27+37+...
OR
The series for {{{2+10(n-1)}}} ADDED TO the series for {{{7+10(n-1)}}}.


If you want the series for the first 10 terms, then
using the arithmetic sum formula


.
....


Do the sum of both of these for their FIRST FIVE TERMS.
Use sum of arithmetic series formula.