Помогите 556 под А :))))

= $= \sqrt{ \sqrt{2 }^2-2*1* \sqrt{2}+1^2} *\sqrt{\sqrt{2 }^2+2*1* \sqrt{2}+1^2} - \\ -\sqrt{ \sqrt{6} ^2-2*1* \sqrt{6}+1^2}* \sqrt{ \sqrt{6} ^2-2*1* \sqrt{6}+1^2}= \\ = \sqrt{( \sqrt{2}-1 )^2}* \sqrt{( \sqrt{2}+1 )^2}- \sqrt{( \sqrt{7}-1 )^2}* \sqrt{( \sqrt{7}+1 )^2}= \\ =| \sqrt{2}-1|*| \sqrt{2}+1|- |\sqrt{7}-1|* |\sqrt{7}+1|= \\ = ( \sqrt{2}-1)*( \sqrt{2}+1)- (\sqrt{7}-1)* (\sqrt{7}+1)= \\ = \sqrt{2}^2-1- \sqrt{7}^2+1=2-7=-5$