Find the sum of all complete squares in [10009999]

Find the sum of all complete squares in [10009999]

32²+32²+…… +99²=(1²+2²+…… +99²)-(1²+2²+…… +31 & # 178;) = 99 * 100 * 199 / 6-31 * 32 * 63 / 6 "use formula 1 & # 178; + 2 & # 178; +..." +n²=n(n+1)(2n+1)/6“=328350-10416=31...