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How can I find the sum of first 20 positive perfect square?

When I type " k^2 for k in [1..20] ",

it says

" k**Integer(2) for k in (ellipsis_range(Integer(1),Ellipsis,Integer(20))) ^ SyntaxError: invalid syntax "

What can I type?

How can I find the sum of first 20 positive perfect square?

Hi! First post!

When I type " k^2 for k in [1..20] ",

it says

" k**Integer(2) for k in (ellipsis_range(Integer(1),Ellipsis,Integer(20))) ^ SyntaxError: invalid syntax "

What can I type?