Find the sum, given the first term t1, the common ratio r, and number of terms n.
If input t1=1, r=1, n=7 then output y=7
If input t1=10, r=10, n=5 then output y=111110.
Remove all the words that end with "ain"
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How long is the longest prime diagonal?
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Create One Large Eye of size N x N Quickly?
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