Sums of powers
Adding up squares
asked
= 285
the formula summed
= 204
0
2
+ 1
2
+ … + (m − 1)
2
=
m
3
+ 3B
1
m
2
+ 3B
2
m
3
3
=
729 − 243/2 + 9/2
3
Every step correct, a different question answered.