(50^2) / (30((28.89/100) + (3.5/50)))
-27/8+1
solution for
x^2+y^2+7xy-10z-3=0
4p+3q=-5
7p+3q=-11
6*(3*n + 1)^2 - 1
6*(3*n - 2)^2 - 1
|x+y| + |x-y| = 2 find number of integral solutions of x and y.
6*(3*n - 1)^2 - 1
