1.
Let α,β\alpha, \beta be the roots of the equation x2−2x−3=0x^2 - \sqrt{2} x - \sqrt{3} = 0. Let Pn=αn−βnP_n = \alpha^n - \beta^n, n∈Nn \in \mathbb{N}. Then (113−102)P10+(112+10)P11−11P12(11\sqrt{3} - 10\sqrt{2}) P_{10} + (11\sqrt{2} + 10) P_{11} - 11 P_{12} is equal to