Question

$1 {}^{2} + (1 {}^{2} + 2 {}^{2} ) + (1 {}^{2} + 2 {}^{2} + 3 {}^{2} ) + (1 {}^{2} + 2 {}^{2} + 3 {}^{2} + 4 {}^{2} ) + ...........$
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Answer 1

Answer:

¹¼⅔6⅝496³¾⅝8⅜84⅝²⅛08-878/87