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Find the following sums : (i) 1 + 2 +...

Find the following sums :
`(i) 1 + 2 + 3 + …+ 30`
(ii) ` 1^(2) + 2^(2) + 3^(2) + …+35^(2)`
(ii)`1^(3) + 2^(3) + 3^(3) +…+ 20^(3)` .

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(i) 465
(ii) 14910
(iii) 44100
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