Symbolic summation in Wolfram|Aplha

Questions
1

Hi, I’m wondering if it’s possible to write a sum like this in Wolfram Alpha:

\sum \limits _{i = 1}^{3} a_i

I’d like to get the result a_1 + a_2 + a_3 in WA.

Thank you for your time.

2

This

Sum a(i),i=1 to 3

returns

a(1)+a(2)+a(3)

and, if you really must, you can try clicking on the Math Input button in WA to see if you can get it to correctly interpret and display subscripted variables

3

Hello @Bill Nelson, thank you very much for your precious help.