Given that x2 + y2 = 1, x > 0, Y > 0, and loga (1 + x) = m, loga (11 − x) = n, then=______ .

Given that x2 + y2 = 1, x > 0, Y > 0, and loga (1 + x) = m, loga (11 − x) = n, then=______ .

Therefore, the answer is: m − N2