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.
Encode Roman Numerals
First N Perfect Squares
Swap the input arguments
Calculate the area of a triangle between three points
Generate N equally spaced intervals between -L and L
area of an annulus
Given a number N, find the smallest prime P>N
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