Question 115
Compute
$$
100^{2}+99^{2}-98^{2}-97^{2}+96^{2}+95^{2}-94^{2}-93^{2}+\ldots+4^{2}+3^{2}-2^{2}-1^{2}
$$
$$
100^{2}+99^{2}-98^{2}-97^{2}+96^{2}+95^{2}-94^{2}-93^{2}+\ldots+4^{2}+3^{2}-2^{2}-1^{2}
$$
MathNet 2017-part-07 — 172 problems (EN–VI) Question 115
Math Olympiad Vault · MathNet 2017-part-07 — 172 problems (EN–VI)