Answer:
5050
Explanation:
To solve via calculator, go to the MATH menu, then the 0th option should say "summation" and insert it from there.
To solve algebraically, break the summation into 2 parts. Excuse the strange formatting, I can't find a way to do it normally.
4(
∑n) -
= 4(
) - 50(1)
= 5100 - 50
= 5050