Maximize
3 x1p - 3 x1n + 11 x2 + 9 x3 - x4 - 29 x5
Subject To
            x2 + x3 + x4 - 2 x5 <= 4
x1p - x1n - x2 + x3 + 2 x4 + x5 >= 0
x1p - x1n + x2 + x3 - 3 x5 <= 1
End